{"id":320,"date":"2024-11-12T08:16:00","date_gmt":"2024-11-12T00:16:00","guid":{"rendered":"https:\/\/mitongxue.cn\/?p=320"},"modified":"2026-06-12T11:03:05","modified_gmt":"2026-06-12T03:03:05","slug":"%e5%89%8d%e7%ab%af%e9%9d%a2%e8%af%95%e9%a2%98%e6%95%b4%e7%90%86","status":"publish","type":"post","link":"https:\/\/mitongxue.cn\/index.php\/2024\/11\/12\/%e5%89%8d%e7%ab%af%e9%9d%a2%e8%af%95%e9%a2%98%e6%95%b4%e7%90%86\/","title":{"rendered":"\u524d\u7aef\u9762\u8bd5\u9898\u6574\u7406"},"content":{"rendered":"\n<ul class=\"wp-block-list\"><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e2d\u7ea7\u524d\u7aef\u5de5\u7a0b\u5e08\u9762\u8bd5\u9898<br>\u4e00\u3001\u9009\u62e9\u9898\uff0810\u9898\uff0c\u6bcf\u98983\u5206\uff09*!<br>1. \u4ee5\u4e0b\u4ee3\u7801\u7684\u8f93\u51fa\u7ed3\u679c\u662f\u4ec0\u4e48\uff1f\uff08<strong>B<\/strong>\uff09<br>console.log(typeof null);<br>A. &#8220;null&#8217;<br>B. &#8220;object&#8221;<br>C. &#8220;undefined&#8221;<br>D. &#8220;number&#8221;<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u7b54\u6848\uff1aB\uff08\u539f\u9898\u62fc\u5199 obiect \u662f object \u7b14\u8bef\uff09\n\u89e3\u6790\uff1aJS \u5386\u53f2 bug\uff0ctypeof null === 'object'\u3002<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><br>2.\u5173\u4e8e\u539f\u578b\u94fe\uff0c\u4ee5\u4e0b\u8bf4\u6cd5\u6b63\u786e\u7684\u662f\uff1a\uff08<strong>D<\/strong>\uff09<br>A. \u6240\u6709\u5bf9\u8c61\u6700\u7ec8\u90fd\u6307\u5411 Object.prototvpe\u2019<br>B.&#8217;Object.create(null)\uff0c\u521b\u5efa\u7684\u5bf9\u8c61\u6709\u539f\u578b<br>C.&#8217;Array.prototype\u2019\u7684\u539f\u578b\u662f\u2018Object&#8217;<br>D\uff0e\u4fee\u6539\u539f\u578b\u5bf9\u8c61\u7684\u5c5e\u6027\u4f1a\u5f71\u54cd\u6240\u6709\u5b9e\u4f8b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u7b54\u6848\uff1aD\nA\uff1aObject.create(null) \u65e0\u539f\u578b\uff0c\u4e0d\u6307\u5411 Object.prototype\uff1b\nB\uff1aObject.create(null) \u521b\u5efa\u7684\u5bf9\u8c61 __proto__ \u4e3a null\uff0c\u6ca1\u6709\u539f\u578b\uff1b\nC\uff1aArray.prototype.__proto__ \u662f Object.prototype\uff0c\u4e0d\u662f Object \u6784\u9020\u51fd\u6570\uff1b\nD\uff1a\u539f\u578b\u662f\u5171\u4eab\u5bf9\u8c61\uff0c\u4fee\u6539\u539f\u578b\u5c5e\u6027\uff0c\u6240\u6709\u5b9e\u4f8b\u8bfb\u53d6\u90fd\u4f1a\u53d8\u5316\uff0c\u6b63\u786e\u3002<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><br>3.vue \u4e2d\uff0c\u4ee5\u4e0b\u54ea\u4e2a\u751f\u547d\u5468\u671f\u94a9\u5b50\u51fd\u6570\u5728\u7ec4\u4ef6\u9996\u6b21\u6e32\u67d3\u65f6\u88ab\u8c03\u7528\uff1f\uff08<strong>A<\/strong>\uff09<br>A. &#8216;mounted&#8221;<br>B. &#8216;created&#8217;<br>C. &#8216;beforeMount<br>D. &#8216;updated&#8217;<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u7b54\u6848\uff1aA mounted\n\u89e3\u6790\uff1a\ncreated\uff1a\u5b9e\u4f8b\u521b\u5efa\u5b8c\u6bd5\uff0cDOM \u672a\u751f\u6210\uff1b\nbeforeMount\uff1a\u6302\u8f7d\u524d\uff0cDOM \u672a\u63d2\u5165\u9875\u9762\uff1b\nmounted\uff1aDOM \u6302\u8f7d\u5230\u9875\u9762\uff0c\u9996\u6b21\u6e32\u67d3\u5b8c\u6210\uff1b\nupdated\uff1a\u6570\u636e\u66f4\u65b0\u540e\u91cd\u65b0\u6e32\u67d3\u89e6\u53d1\uff0c\u4e0d\u662f\u9996\u6b21\u6e32\u67d3\u3002<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><br>4. \u5728React \u51fd\u6570\u7ec4\u4ef6\u4e2d\uff0c\u7528\u4e8e\u5904\u7406\u526f\u4f5c\u7528\u7684 Hook \u662f\uff1a\uff08<strong>B<\/strong>\uff09<br>A. &#8216;useState&#8217;<br>B. &#8216;useEffect&#8217;<br>C. &#8216;useContext&#8217;<br>D. &#8216;useReducer&#8217;<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u7b54\u6848\uff1aB useEffect\nuseState\uff1a\u72b6\u6001\uff1buseContext\uff1a\u4e0a\u4e0b\u6587\uff1buseReducer\uff1a\u590d\u6742\u72b6\u6001\u3002<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><br>5.\u4ee5\u4e0b Es6 \u8bed\u6cd5\u4e2d\uff0c\u9519\u8bef\u7684\u662f\uff1a\uff08<strong>D<\/strong>\uff09<br>A. &#8216;const { a, b} = obj;&#8217;<br>B. &#8216;let x = (a, b) => a + b;&#8217;<br>C. &#8216;class MyClass extends ParentClass 1&#8217;<br>D. &#8216;import * as utils from &#8216; \/utils.js&#8217;;&#8217;<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\n\u7b54\u6848\uff1aD\n\u7b14\u8bef\u4fee\u6b63\uff1a\u8def\u5f84\u4e0d\u80fd\u5199 \/utils.is\uff0c\u6587\u4ef6\u540d\u540e\u7f00\u4e00\u822c\u662f .js\uff1b\u4e14\u5bfc\u5165\u8def\u5f84\u683c\u5f0f\u9519\u8bef\u3002\nA \u89e3\u6784\u3001B \u7bad\u5934\u51fd\u6570\u3001C \u7c7b\u7ee7\u627f\u8bed\u6cd5\u5168\u90e8\u5408\u6cd5\u3002<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><br>6. \u5173\u4e8e\u4e8b\u4ef6\u5faa\u73af\uff0c\u4ee5\u4e0b\u4ee3\u7801\u7684\u8f93\u51fa\u987a\u5e8f\u662f\uff1a(B)<br>&#8220;javascript<br>setTimeout(() => console. log(1), 0);<br>Promise.resolve (). then (() => console. log(2)); <br>console.log(3);<br>A. 3, 1, 2<br>B. 3, 2, 1<br>C. 1, 3, 2<br>A. 2, 3, 1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u6267\u884c\u987a\u5e8f\uff1a\u540c\u6b65\u4ee3\u7801 \u2192 \u5fae\u4efb\u52a1 Promise.then \u2192 \u5b8f\u4efb\u52a1 setTimeout\n\u8f93\u51fa\uff1a3,2,1\uff0c\u7b54\u6848B\u3002<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><br>7.vuve3 \u7684Compostition Ap1 \u4e2d\uff0c\u7528\u624b\u5357\u5e94\u5f0f\u5f15\u7528\u7684\u662f\uff1a(A)<br>A. ref<br>B. &#8216;reactive<br>C. computed<br>D. watch<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u7b54\u6848\uff1aA ref\nref\uff1a\u57fa\u672c\u7c7b\u578b \/ \u5355\u4e2a\u5bf9\u8c61\u54cd\u5e94\u5f0f\uff1b\nreactive \u4ec5\u5bf9\u8c61 \/ \u6570\u7ec4\uff1b\n\u9898\u5e72 \u201c\u5f15\u7528\u5f0f\u201d \u6307\u5411 ref\u3002<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><br>8.\u4ee5\u4e0b\u54ea\u4e2a\u65b9\u6cd5\u53ef\u4ee5\u5f3a\u5236\u89e6\u53d1 React \u7ec4\u4ef6\u7684\u4e9a\u65b0\u6e32\u67d3\uff1f(C)<br>A. this.forceUpdate()\u00b0<br>B. this.setstate(\u00ae)\u00b0<br>C.\u4e24\u8005\u90fd\u53ef\u4ee5<br>D.\u4e24\u8005\u90fd\u4e0d\u53ef\u4ee5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u7b54\u6848\uff1aC \u4e24\u8005\u90fd\u53ef\u4ee5\nthis.forceUpdate()\uff1a\u65e0\u89c6 state\/props \u5f3a\u5236\u5237\u65b0\uff1b\nthis.setState({}) \u7a7a\u66f4\u65b0\u4e5f\u4f1a\u89e6\u53d1 render \u91cd\u6e32\u67d3\u3002<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><br>9.\u5173\u4e8e\u95ed\u5305\uff0c\u4ee5\u4e0b\u4ee3\u7801\u7684\u8f93\u51fa\u7ed3\u679c\u662f\u4ec0\u4e48\uff1f(A)<br>&#8220;javascript<br>function createFunc() {<br>let a = 1;<br>return function() ( console.log(a++); );<br>const func = createFunc();<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">}<br>func();<br>func();<br>A. 1, 2<br>B. 1. 1<br>C. 2, 3<br>D. 1, undefined<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u95ed\u5305\u4fdd\u7559\u5916\u5c42a\u5f15\u7528\uff0c\u7b2c\u4e00\u6b21\u8f93\u51fa 1\uff0c\u81ea\u589e\u4e3a 2\uff1b\u7b2c\u4e8c\u6b21\u8f93\u51fa 2\u3002\n\u7b54\u6848\uff1aA 1,2<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><br>10.ES6 \u4e2d\uff0c\u4ee5\u4e0b\u5173\u4e8e vet\u548c var\u7684\u8bf4\u6cd5\u9519\u8bef\u7684\u662f\uff1a<br>A. let\u5b58\u5728\u6682\u65f6\u6027\u6b7b\u533a<br>B. var\u58f0\u660e\u7684\u53d8\u91cf\u4f1a\u6302\u6559\u5230\u5168\u5c40\u5bf9\u8c61\u4e0a<br>C. let\u5141\u8bb8\u91cd\u590d\u58f0\u660e<br>D. var\u5b58\u5728\u53d8\u91cf\u63d0\u5347<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u7b54\u6848\uff1aC\n\u89e3\u6790\uff1alet \u540c\u4e00\u4f5c\u7528\u57df\u7981\u6b62\u91cd\u590d\u58f0\u660e\uff1b\nA\uff1alet \u6709\u6682\u65f6\u6027\u6b7b\u533a TDZ\uff1b\nB\uff1avar \u5168\u5c40\u53d8\u91cf\u6302\u8f7d window\uff1b\nD\uff1avar \u5b58\u5728\u53d8\u91cf\u63d0\u5347\u3002<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><br>\uff0820\u9898\uff0c\u6bcf\u98982\u5206\uff09*<br>1.javascript\u4e2d0.1+0.2===0.3\u301d \u7684\u7ed3\u679c\u662ftrue&#8217;\u3002<br>2.Vue\u4e2d v-if\u548c v-show\u7684\u4f5c\u7528\u5b8c\u5168\u76f8\u540c\u3002<br>3.React\u4e2dsetState\u2022\u662f\u540c\u6b65\u64cd\u4f5c\u3002<br>4.0bject.keys()\u53ef\u4ee5\u83b7\u53d6\u5bf9\u8c61\u539f\u578b\u4e0a\u7684\u5c5e\u6027\u3002<br>6.&#8217;Promise.all \u4f1a\u5728\u6240\u6709 Promise \u90fd\u6210\u529f\u65f6\u8fd4\u56de\u7ed3\u679c\u6570\u7ec4\u3002<br>7.vue \u7ec4\u4ef6\u95f4\u7684\u901a\u4fe1\u53ea\u80fd\u8fce\u8fc7 props\u2019 \u548c semit\uff1a \u5b9e\u73fe\u3002<br>\u00a7.ES6 \u7684\u6a21\u677f\u5b57\u7b26\u4e32\u53ef\u4ee5\u8054\u5957\u4f7f\u7528\u3002<br>9.null instanceof Object \u7684\u7ed3\u679c\u662f true&#8217;\u3002<br>10.React \u51fd\u6570\u7ec4\u4ef6\u4e2d\u53ef\u4ee5\u4f7f\u7528\u751f\u547d\u5468\u671f\u65b9\u6cd5\u3002<br>11.const \u58f0\u660e\u7684\u4ea4\u91cf\u4e0d\u53ef\u91cd\u65b0\u8d4b\u503c\uff0c\u4f46\u5bf9\u8c61\u5c5e\u6027\u53ef\u4ee5\u4fee\u6539\u3002<br>12.&#8217;Array.prototype.map\u2019\u4f1a\u6539\u53d8\u539f\u6570\u7ec4\u3002<br>13.vue\u7684v-moder&#8217; \u53ef\u4ee5\u7528\u4e8e\u81ea\u5b9a\u4e49\u7ec4\u4ef6\u3002<br>14.&#8217;typeof[] \u7684\u7ed3\u679c\u662f &#8220;array&#8221;\u2019\u3002<br>15. React Hooks \u53ea\u80fd\u5728\u51fd\u6570\u7ec4\u4ef6\u4e2d\u4f7f\u7528\u3002<br>16.0bject.assign\u2019\u662f\u6d45\u6301\u8d1d\u3002<br>17.Javascript \u4e2d\u6240\u6709\u51fd\u6570\u90fd\u662f Function\u7684\u5b9e\u4f8b\u3002<br>18.vue3 \u652f\u6301 Options API \u548c Composition API \u6df7\u5408\u4f7f\u7528\u3002<br>19, useState\uff1a\u7684\u521d\u59cb\u503c\u53ef\u4ee5\u662f\u4e00\u4e2a\u51fd\u6570\u3002<br>20. for..in \u50a8\u73af\u53ef\u4ee5\u904a\u5386\u6570\u7ec4\u7684\u7d20\u5f15\u548c\u5bf9\u8c61\u7684\u53ef\u679a\u4e3e\u5c5e\u6027\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>0.1+0.2===0.3 \u2192 \u00d7 \u6d6e\u70b9\u6570\u7cbe\u5ea6\u4e22\u5931\uff0c\u7ed3\u679c false\nVue v-if \u548c v-show \u5b8c\u5168\u76f8\u540c \u2192 \u00d7\nv-if \u9500\u6bc1\u91cd\u5efa DOM\uff1bv-show CSS \u9690\u85cf DOM\uff0c\u5f00\u9500\u4e0d\u540c\u3002\nReact setState \u540c\u6b65\u64cd\u4f5c \u2192 \u00d7\n\u5408\u6210\u4e8b\u4ef6 \/ \u751f\u547d\u5468\u671f\u5185\u6279\u91cf\u5f02\u6b65\uff1b\u539f\u751f\u4e8b\u4ef6\u3001\u5b9a\u65f6\u5668\u5185\u540c\u6b65\u3002\nObject.keys() \u83b7\u53d6\u539f\u578b\u5c5e\u6027 \u2192 \u00d7\n\u4ec5\u83b7\u53d6\u81ea\u8eab\u53ef\u679a\u4e3e\u5c5e\u6027\uff0c\u4e0d\u904d\u5386\u539f\u578b\u94fe\u3002\nPromise.all \u5168\u90e8\u6210\u529f\u624d\u8fd4\u56de\u6570\u7ec4 \u2192 \u221a\n\u4efb\u610f\u4e00\u4e2a reject \u76f4\u63a5\u89e6\u53d1\u5931\u8d25\u3002\nVue \u7ec4\u4ef6\u901a\u4fe1\u53ea\u6709 props\/\n\u8fd8\u6709parent\/$children \u7b49\u3002\nES6 \u6a21\u677f\u5b57\u7b26\u4e32\u53ef\u5d4c\u5957 \u2192 \u221a\nnull instanceof Object \u2192 \u00d7 \u8fd4\u56de false\nReact \u51fd\u6570\u7ec4\u4ef6\u4e0d\u80fd\u4f7f\u7528 class \u751f\u547d\u5468\u671f\u94a9\u5b50 \u2192 \u00d7\nconst \u5bf9\u8c61\u53d8\u91cf\u4e0d\u80fd\u91cd\u8d4b\u503c\uff0c\u4f46\u5c5e\u6027\u53ef\u4fee\u6539 \u2192 \u221a\nArray.map \u4fee\u6539\u539f\u6570\u7ec4 \u2192 \u00d7 map \u8fd4\u56de\u65b0\u6570\u7ec4\uff0c\u4e0d\u6539\u52a8\u539f\u6570\u7ec4\nVue v-model \u53ef\u7528\u4e8e\u81ea\u5b9a\u4e49\u7ec4\u4ef6 \u2192 \u221a \u81ea\u5b9a\u4e49 v-model \u8bed\u6cd5\u7cd6\ntypeof &#91;] \u2192 \"array\" \u2192 \u00d7 \u8fd4\u56de\"object\"\uff0c\u4e0d\u662f \"array\"\uff0c\u8fd9\u662f JS \u5386\u53f2\u9057\u7559 bug\uff0c\u4e0d\u80fd\u7528 typeof \u5224\u65ad\u6570\u7ec4Array.isArray(&#91;])\nReact Hooks \u53ea\u80fd\u5728\u51fd\u6570\u7ec4\u4ef6\u8c03\u7528 \u2192 \u221a\uff08\u81ea\u5b9a\u4e49 Hook \u672c\u8d28\u4e5f\u662f\u51fd\u6570\u7ec4\u4ef6\u89c4\u5219\uff09\nObject.assign \u6d45\u62f7\u8d1d \u2192 \u221a\nJS \u6240\u6709\u51fd\u6570\u90fd\u662fFunction\u5b9e\u4f8b \u2192 \u221a\nVue3 \u53ef\u6df7\u5408 Options API + Composition API \u2192 \u221a\nuseState\u521d\u59cb\u503c\u652f\u6301\u51fd\u6570 \u2192 \u221a \u60f0\u6027\u521d\u59cb\u5316\nfor...in \u904d\u5386\u6570\u7ec4\u7d22\u5f15\u3001\u5bf9\u8c61\u53ef\u679a\u4e3e\u5c5e\u6027 \u2192 \u221a\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><br>\u4e09\u3001\u7b80\u7b54\u9898 \uff082\u9898\uff0c\u6bcf\u9898 15\u5206\uff09\uff0e<br>1.\u8bf7\u7b80\u8ff0 JavaScript \u539f\u578b\u94fe\u7684\u5b9e\u73b0\u673a\u5236\uff0c\u5e76\u4e3e\u4f8b\u8bf4\u660e\u539f\u578b\u7ee7\u6d3e\u7684\u4f18\u7f3a\u70b9\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\uff081\uff09\u5b9e\u73b0\u673a\u5236\n\u6bcf\u4e2a\u6784\u9020\u51fd\u6570\u62e5\u6709 prototype \u539f\u578b\u5bf9\u8c61\uff1b\n\u6784\u9020\u51fd\u6570 new \u51fa\u7684\u5b9e\u4f8b\u62e5\u6709 __proto__\uff0c\u6307\u5411\u6784\u9020\u51fd\u6570\u7684prototype\uff1b\n\u539f\u578b\u5bf9\u8c61\u81ea\u8eab\u4e5f\u6709__proto__\uff0c\u5c42\u5c42\u5411\u4e0a\u67e5\u627e\uff0c\u76f4\u5230\u9876\u7aefObject.prototype.__proto__ === null\uff1b\n\u8bbf\u95ee\u5bf9\u8c61\u5c5e\u6027 \/ \u65b9\u6cd5\u65f6\uff1a\u5148\u5728\u81ea\u8eab\u67e5\u627e\uff0c\u627e\u4e0d\u5230\u987a\u7740__proto__\u5411\u4e0a\u904d\u5386\u6574\u6761\u539f\u578b\u94fe\uff0c\u76f4\u5230\u627e\u5230\u6216\u5230\u94fe\u5c3e\u505c\u6b62\u3002\n\u793a\u4f8b\uff1a\njs\n\u8fd0\u884c\nfunction Person(){}\nPerson.prototype.say = function(){}\nconst p = new Person();\n\/\/ p.__proto__ === Person.prototype\n\/\/ Person.prototype.__proto__ === Object.prototype\n\uff082\uff09\u539f\u578b\u7ee7\u627f\u4f18\u70b9\n\u8282\u7701\u5185\u5b58\uff1a\u65b9\u6cd5\u6302\u8f7d\u539f\u578b\uff0c\u6240\u6709\u5b9e\u4f8b\u5171\u4eab\u540c\u4e00\u4efd\u51fd\u6570\uff0c\u4e0d\u7528\u6bcf\u4e2a\u5b9e\u4f8b\u5355\u72ec\u590d\u5236\uff1b\n\u5929\u7136\u5b9e\u73b0\u7ee7\u627f\uff0c\u6269\u5c55\u539f\u578b\u5373\u53ef\u6279\u91cf\u7ed9\u6240\u6709\u5b9e\u4f8b\u65b0\u589e\u65b9\u6cd5\uff1b\nJS \u539f\u751f\u5185\u7f6e\uff0c\u6570\u7ec4\u3001\u5185\u7f6e\u5bf9\u8c61\u90fd\u57fa\u4e8e\u539f\u578b\u94fe\u5b9e\u73b0\u6269\u5c55\u3002\n\uff083\uff09\u7f3a\u70b9\n\u539f\u578b\u5f15\u7528\u7c7b\u578b\u5c5e\u6027\u4f1a\u88ab\u6240\u6709\u5b9e\u4f8b\u5171\u4eab\uff0c\u4e00\u4e2a\u5b9e\u4f8b\u4fee\u6539\u6570\u7ec4 \/ \u5bf9\u8c61\uff0c\u5168\u90e8\u5b9e\u4f8b\u540c\u6b65\u6539\u52a8\uff1b\n\u65e0\u6cd5\u5411\u7236\u6784\u9020\u51fd\u6570\u5355\u72ec\u4f20\u53c2\uff0c\u5b9e\u4f8b\u521d\u59cb\u5316\u7075\u6d3b\u6027\u5dee\uff1b\n\u591a\u5c42\u539f\u578b\u94fe\u5d4c\u5957\u8fc7\u6df1\uff0c\u5c5e\u6027\u67e5\u627e\u904d\u5386\u5c42\u7ea7\u591a\uff0c\u5b58\u5728\u6027\u80fd\u635f\u8017\u3002<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><br>2.\u5bf9\u6bd4Vue\u548cReact\u5728\u6570\u636e\u7ed1\u5b9a\uff0c\u7ec4\u4ef6\u901a\u4fe1\u548c\u72b6\u6001\u7ba1\u7406\u4e0a\u7684\u5f02\u540c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u4e00\u3001\u6570\u636e\u7ed1\u5b9a\n\u76f8\u540c\u70b9\n\u90fd\u662f\u5355\u5411\u6570\u636e\u6d41\u4e3a\u6838\u5fc3\u7406\u5ff5\uff1b\n\u89c6\u56fe\u4f9d\u8d56\u72b6\u6001\uff0c\u72b6\u6001\u9a71\u52a8\u89c6\u56fe\u66f4\u65b0\uff0c\u6452\u5f03 DOM \u624b\u52a8\u64cd\u4f5c\uff1b\n\u6570\u636e\u53d8\u66f4\u81ea\u52a8\u89e6\u53d1\u89c6\u56fe\u91cd\u65b0\u6e32\u67d3\u3002\n\u4e0d\u540c\u70b9\nVue\uff1a\n\u53cc\u5411\u7ed1\u5b9a\uff1av-model\u8bed\u6cd5\u7cd6\uff0c\u5e95\u5c42\u7ed1\u5b9a value + \u76d1\u542c input \u4e8b\u4ef6\uff1b\n\u54cd\u5e94\u5f0f\u539f\u7406\uff1aVue2 Object.defineProperty\u3001Vue3 Proxy\uff0c\u81ea\u52a8\u4f9d\u8d56\u6536\u96c6\uff0c\u7cbe\u51c6\u66f4\u65b0\u7ec4\u4ef6\uff1b\n\u6a21\u677f\u8bed\u6cd5\uff1aHTML \u6a21\u677f\uff0c\u6307\u4ee4\u9a71\u52a8\u3002\nReact\uff1a\n\u4e25\u683c\u5355\u5411\u7ed1\u5b9a\uff0c\u65e0\u539f\u751f\u53cc\u5411\u7ed1\u5b9a\uff1b\u53cc\u5411\u9700\u8981\u624b\u52a8\u5c01\u88c5value+onChange\uff1b\n\u65e0\u54cd\u5e94\u5f0f\u76d1\u542c\uff0c\u9760setState\/setXxx\u89e6\u53d1\u91cd\u6e32\u67d3\uff1b\nJSX \u8bed\u6cd5\uff0cJS \u548c HTML \u6df7\u5199\u3002\n\u4e8c\u3001\u7ec4\u4ef6\u901a\u4fe1\n\u76f8\u540c\u70b9\n\u7236\u5b50\u7ec4\u4ef6\uff1a\u7236\u4f20\u5b50\u5c5e\u6027\uff0c\u5b50\u89e6\u53d1\u56de\u8c03\u7ed9\u7236\u4f20\u503c\uff1b\n\u8de8\u5c42\u7ea7\u90fd\u652f\u6301\u900f\u4f20\u3001\u5168\u5c40\u4e8b\u4ef6\u3001\u5168\u5c40\u72b6\u6001\u5e93\uff1b\n\u5144\u5f1f\u7ec4\u4ef6\u501f\u52a9\u5171\u540c\u7236\u7ec4\u4ef6\u4e2d\u8f6c\u901a\u4fe1\u3002\n\u4e0d\u540c\u70b9\nVue\n\u7236\u5b50\uff1aprops \/ $emit\uff1b\n\u8de8\u5c42\u7ea7\uff1aprovide\/inject\uff1b\n\u5168\u5c40\uff1aEventBus\u3001Pinia\/Vuex\uff1b\n\u8bbf\u95ee\u5b9e\u4f8b\uff1a$parent\/$children\/$refs\u3002\nReact\n\u7236\u5b50\uff1aprops \u4f20\u53c2 + \u56de\u8c03\u51fd\u6570\uff1b\n\u8de8\u5c42\u7ea7\uff1auseContext\u4e0a\u4e0b\u6587\uff1b\n\u65e0\u539f\u751f\u4e8b\u4ef6\u603b\u7ebf\uff0c\u4f9d\u8d56\u7b2c\u4e09\u65b9\u5e93\uff1b\n\u51fd\u6570\u7ec4\u4ef6\u65e0\u5b9e\u4f8b\uff0c\u4e0d\u80fd\u76f4\u63a5\u62ff\u7ec4\u4ef6 DOM \u5b9e\u4f8b\u3002\n\u4e09\u3001\u72b6\u6001\u7ba1\u7406\n\u76f8\u540c\u70b9\n\u7ec4\u4ef6\u5185\u79c1\u6709\u72b6\u6001\uff1a\u7ec4\u4ef6\u81ea\u8eab\u7ef4\u62a4\uff0c\u4e0d\u5168\u5c40\u5171\u4eab\uff1b\n\u5168\u5c40\u72b6\u6001\u5e93\uff1a\u96c6\u4e2d\u7ba1\u7406\u516c\u5171\u72b6\u6001\uff0c\u7ec4\u4ef6\u5171\u4eab\u3001\u7edf\u4e00\u4fee\u6539\uff1b\n\u652f\u6301\u6a21\u5757\u5316\u62c6\u5206\u5168\u5c40\u72b6\u6001\uff0c\u907f\u514d\u5355\u4e00\u72b6\u6001\u81c3\u80bf\u3002\n\u4e0d\u540c\u70b9\nVue\nVue2\uff1aVuex\uff1bVue3\uff1aPinia\uff08\u65e0 mutations\u3001\u6a21\u5757\u5316\u66f4\u7b80\u6d01\uff09\uff1b\n\u72b6\u6001\u81ea\u5e26\u54cd\u5e94\u5f0f\uff0c\u4fee\u6539 state \u76f4\u63a5\u8d4b\u503c\u5373\u53ef\u66f4\u65b0\uff1b\nReact\n\u539f\u751f\uff1auseState\/useReducer\u5c40\u90e8\u72b6\u6001\uff1b\n\u5168\u5c40\u4e3b\u6d41\uff1aRedux\u3001Zustand\u3001Jotai\uff1b\n\u4e0d\u53ef\u53d8\u6570\u636e\u539f\u5219\uff1a\u4e0d\u80fd\u76f4\u63a5\u4fee\u6539 state\uff0c\u5fc5\u987b\u8fd4\u56de\u5168\u65b0\u5bf9\u8c61\u89e6\u53d1\u66f4\u65b0\u3002<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u5173\u952e\u4ee3\u7801\u9a8c\u8bc1\uff08\u590d\u5236\u53ef\u76f4\u63a5\u8fd0\u884c\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u884c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ 1. \u81ea\u5b9a\u4e49\u6784\u9020\u51fd\u6570\nfunction Person() {}\nconst p = new Person();\n\nconsole.log(p.__proto__ === Person.prototype); \/\/ true\nconsole.log(Person.prototype.__proto__ === Object.prototype); \/\/ true\nconsole.log(Object.prototype.__proto__ === null); \/\/ true\n\n\/\/ 2. \u6570\u7ec4\nconst arr = &#91;];\nconsole.log(arr.__proto__ === Array.prototype); \/\/ true\nconsole.log(Array.prototype.__proto__ === Object.prototype); \/\/ true\n\n\/\/ 3. \u6784\u9020\u51fd\u6570\u90fd\u662f Function \u5b9e\u4f8b\nconsole.log(Person.__proto__ === Function.prototype); \/\/ true\nconsole.log(Array.__proto__ === Function.prototype); \/\/ true\nconsole.log(Function.prototype.__proto__ === Object.prototype); \/\/ true\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u539f\u578b\u94fe\u67e5\u627e\u89c4\u5219\uff08\u5fc5\u80cc\uff09<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8bfb\u53d6 <code>p.xxx<\/code> \u65f6\uff0c\u5148\u5728\u5b9e\u4f8b\u81ea\u8eab\u5c5e\u6027\u67e5\u627e\uff1b<\/li>\n\n\n\n<li>\u627e\u4e0d\u5230\u5c31\u987a\u7740 <code>__proto__<\/code> \u53bb <code>Person.prototype<\/code> \u627e\uff1b<\/li>\n\n\n\n<li>\u8fd8\u627e\u4e0d\u5230\u7ee7\u7eed\u4e0a\u6eaf\u5230 <code>Object.prototype<\/code>\uff1b<\/li>\n\n\n\n<li>\u8ffd\u5230 <code>null<\/code> \u4ecd\u65e0\u8be5\u5c5e\u6027\uff0c\u8fd4\u56de <code>undefined<\/code>\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u516d\u3001\u9ad8\u9891\u6613\u9519\u70b9<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>prototype<\/code> \u53ea\u5c5e\u4e8e<strong>\u6784\u9020\u51fd\u6570<\/strong>\uff0c\u5b9e\u4f8b\u53ea\u6709 <code>__proto__<\/code>\uff1b<\/li>\n\n\n\n<li><code>typeof Person.prototype<\/code> \u2192 <code>object<\/code>\uff0c\u6240\u6709\u539f\u578b\u5bf9\u8c61\u90fd\u662f\u666e\u901a\u5bf9\u8c61\uff1b<\/li>\n\n\n\n<li>\u4fee\u6539\u539f\u578b\u4e0a\u7684\u5c5e\u6027\uff0c\u6240\u6709\u5171\u4eab\u8be5\u539f\u578b\u7684\u5b9e\u4f8b\u90fd\u4f1a\u53d7\u5f71\u54cd\uff1b<\/li>\n\n\n\n<li><code>Object.create(null)<\/code> \u521b\u5efa\u7684\u5bf9\u8c61\u65e0 <code>__proto__<\/code>\uff0c\u4e0d\u5728\u6807\u51c6\u539f\u578b\u94fe\u4e0a\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e2d\u7ea7\u524d\u7aef\u5de5\u7a0b\u5e08\u9762\u8bd5\u9898\u4e00\u3001\u9009\u62e9\u9898\uff0810\u9898\uff0c\u6bcf\u98983\u5206\uff09..<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,23],"tags":[],"class_list":["post-320","post","type-post","status-publish","format-standard","hentry","category-front","category-23"],"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","1536x1536":"","2048x2048":""},"author_info":{"info":["\u9648 \u67d0\u4eba"]},"category_info":"<a href=\"https:\/\/mitongxue.cn\/index.php\/category\/front\/\" rel=\"category tag\">\u524d\u7aef<\/a> <a href=\"https:\/\/mitongxue.cn\/index.php\/category\/front\/%e8%af%95%e9%a2%98\/\" rel=\"category tag\">\u8bd5\u9898<\/a>","tag_info":"\u8bd5\u9898","comment_count":"0","_links":{"self":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/320","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/comments?post=320"}],"version-history":[{"count":15,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/320\/revisions"}],"predecessor-version":[{"id":335,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/320\/revisions\/335"}],"wp:attachment":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/media?parent=320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/categories?post=320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/tags?post=320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}