{"id":310762,"date":"2024-05-20T21:58:05","date_gmt":"2024-05-20T13:58:05","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/310762.html"},"modified":"2024-05-20T21:58:14","modified_gmt":"2024-05-20T13:58:14","slug":"%e5%89%8d%e7%ab%af-ajax-%e7%bc%96%e7%a8%8b%e6%80%8e%e4%b9%88%e5%ae%9e%e7%8e%b0%e4%b8%89%e7%ba%a7%e8%81%94%e5%8a%a8","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/310762.html","title":{"rendered":"\u524d\u7aef ajax \u7f16\u7a0b\u600e\u4e48\u5b9e\u73b0\u4e09\u7ea7\u8054\u52a8"},"content":{"rendered":"

\"\u524d\u7aef<\/p>\n

\u524d\u7aefAjax\u7f16\u7a0b\u5b9e\u73b0\u4e09\u7ea7\u8054\u52a8\u4e3b\u8981\u6d89\u53ca\u5230AJAX\u5f02\u6b65\u8bf7\u6c42\u3001\u6570\u636e\u5904\u7406\u3001DOM\u64cd\u4f5c<\/strong>\u7b49\u5173\u952e\u6280\u672f\u70b9\u3002\u9996\u5148\uff0c\u901a\u8fc7Ajax\u5f02\u6b65\u8bf7\u6c42\u4e0d\u540c\u7ea7\u522b\u7684\u6570\u636e\u8d44\u6e90\uff0c\u7136\u540e\u5728\u83b7\u53d6\u6570\u636e\u540e\u8fdb\u884c\u76f8\u5e94\u7684\u6570\u636e\u5904\u7406\uff0c\u6700\u540e\u901a\u8fc7DOM\u64cd\u4f5c\u5c06\u5904\u7406\u540e\u7684\u6570\u636e\u6e32\u67d3\u5230\u9875\u9762\u76f8\u5e94\u7684\u4f4d\u7f6e\u3002\u5176\u4e2d\uff0cAJAX\u5f02\u6b65\u8bf7\u6c42<\/strong>\u662f\u6574\u4e2a\u5b9e\u73b0\u8fc7\u7a0b\u4e2d\u7684\u6838\u5fc3\u529f\u80fd\uff0c\u5b83\u5141\u8bb8\u5728\u4e0d\u91cd\u65b0\u52a0\u8f7d\u6574\u4e2a\u9875\u9762\u7684\u60c5\u51b5\u4e0b\uff0c\u4e0e\u670d\u52a1\u5668\u8fdb\u884c\u5c11\u91cf\u6570\u636e\u4ea4\u6362\u3002<\/p>\n<\/p>\n

\u4e00\u3001AJAX\u5f02\u6b65\u8bf7\u6c42<\/h3>\n<\/p>\n

\u7406\u89e3AJAX\u8bf7\u6c42<\/h4>\n<\/p>\n

AJAX\uff08Asynchronous JavaScript and XML\uff09\u662f\u4e00\u79cd\u5728\u65e0\u9700\u91cd\u65b0\u52a0\u8f7d\u6574\u4e2a\u9875\u9762\u7684\u60c5\u51b5\u4e0b\uff0c\u80fd\u591f\u66f4\u65b0\u90e8\u5206\u7f51\u9875\u7684\u6280\u672f\u3002\u4f7f\u7528AJAX\uff0c\u53ef\u4ee5\u4ece\u670d\u52a1\u5668\u83b7\u53d6\u6570\u636e\uff0c\u7136\u540e\u5f02\u6b65\u5730\u663e\u793a\u8fd9\u4e9b\u6570\u636e\u3002\u8fd9\u5bf9\u4e8e\u521b\u5efa\u52a8\u6001\u3001\u7528\u6237\u53cb\u597d\u7684Web\u5e94\u7528\u7a0b\u5e8f\u975e\u5e38\u91cd\u8981\u3002<\/p>\n<\/p>\n

\u5b9e\u73b0AJAX\u8bf7\u6c42<\/h4>\n<\/p>\n

\u8981\u5b9e\u73b0AJAX\u8bf7\u6c42\uff0c\u53ef\u4ee5\u4f7f\u7528\u539f\u751fJavaScript\u7684XMLHttpRequest<\/code>\u5bf9\u8c61\uff0c\u6216\u8005\u4f7f\u7528\u73b0\u4ee3\u5e93\u548c\u6846\u67b6\u63d0\u4f9b\u7684\u62bd\u8c61\uff0c\u5982jQuery\u7684$.ajax<\/code>\u65b9\u6cd5\u3001Axios\u7b49\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528XMLHttpRequest<\/code>\u53d1\u8d77GET\u8bf7\u6c42\u7684\u57fa\u672c\u6b65\u9aa4\uff1a<\/p>\n<\/p>\n

var xhr = new XMLHttpRequest();<\/p>\n
xhr.open('GET', 'url', true);<\/p>\n
xhr.onreadystatechange = function() {<\/p>\n
    if(xhr.readyState == 4 && xhr.status == 200) {<\/p>\n
        console.log(xhr.responseText);<\/p>\n
    }<\/p>\n
};<\/p>\n
xhr.send();<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u6570\u636e\u5904\u7406\u548c\u52a8\u6001\u6e32\u67d3<\/h3>\n<\/p>\n
\u6570\u636e\u5904\u7406<\/h4>\n<\/p>\n
\u5728\u63a5\u6536\u5230AJAX\u8bf7\u6c42\u8fd4\u56de\u7684\u6570\u636e\u540e\uff0c\u901a\u5e38\u9700\u8981\u8fdb\u884c\u4e00\u5b9a\u7684\u5904\u7406\u624d\u80fd\u6b63\u5e38\u5c55\u793a\u3002\u8fd9\u5305\u62ec\u89e3\u6790\u6570\u636e\uff08\u5982JSON.parse()\uff09\u3001\u6570\u636e\u7ed3\u6784\u8f6c\u6362\u7b49\u3002\u5904\u7406\u7684\u76ee\u7684\u662f\u5c06\u6570\u636e\u7ec4\u7ec7\u6210\u9875\u9762\u6e32\u67d3\u6240\u9700\u7684\u683c\u5f0f\u3002<\/p>\n<\/p>\n
\u52a8\u6001\u6e32\u67d3<\/h4>\n<\/p>\n
\u5c06\u5904\u7406\u540e\u7684\u6570\u636e\u52a8\u6001\u6dfb\u52a0\u5230\u9875\u9762\u4e2d\uff0c\u901a\u5e38\u9700\u8981\u8fdb\u884cDOM\u64cd\u4f5c\u3002\u8fd9\u9700\u8981\u4f7f\u7528JavaScript\u521b\u5efa\u65b0\u7684DOM\u5143\u7d20\uff0c\u5e76\u8bbe\u7f6e\u5176\u5c5e\u6027\u548c\u5185\u5bb9\uff0c\u7136\u540e\u5c06\u5176\u63d2\u5165\u5230\u9875\u9762\u7684\u76f8\u5e94\u4f4d\u7f6e\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u4e0b\u62c9\u5217\u8868\uff0c\u53ef\u4ee5\u8fd9\u6837\u64cd\u4f5c\uff1a<\/p>\n<\/p>\n
var select = document.getElementById('mySelect');<\/p>\n
var option = document.createElement('option');<\/p>\n
option.value = '1';<\/p>\n
option.text = 'Option Text';<\/p>\n
select.appendChild(option);<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u5b9e\u73b0\u4e09\u7ea7\u8054\u52a8<\/h3>\n<\/p>\n
\u524d\u7f6e\u5de5\u4f5c<\/h4>\n<\/p>\n
\u4e09\u7ea7\u8054\u52a8\u901a\u5e38\u6307\u7684\u662f\uff0c\u6839\u636e\u7b2c\u4e00\u7ea7\u7684\u9009\u62e9\u5f71\u54cd\u7b2c\u4e8c\u7ea7\u5185\u5bb9\uff0c\u7b2c\u4e8c\u7ea7\u7684\u9009\u62e9\u53c8\u5f71\u54cd\u7b2c\u4e09\u7ea7\u5185\u5bb9\u3002\u56e0\u6b64\uff0c\u9996\u5148\u9700\u8981\u5728HTML\u4e2d\u51c6\u5907\u4e09\u4e2a\u4e0b\u62c9\u5217\u8868\uff08<select><\/code>\uff09\u5143\u7d20\u4f5c\u4e3a\u4e09\u4e2a\u7ea7\u522b\u7684\u5bb9\u5668\u3002<\/p>\n<\/p>\n
\u5177\u4f53\u5b9e\u73b0<\/h4>\n<\/p>\n
    \n
  1. \u9996\u7ea7\u6570\u636e\u52a0\u8f7d<\/strong>\uff1a\u9875\u9762\u521d\u59cb\u5316\u65f6\uff0c\u901a\u8fc7AJAX\u8bf7\u6c42\u52a0\u8f7d\u7b2c\u4e00\u7ea7\u6570\u636e\uff0c\u7136\u540e\u52a8\u6001\u521b\u5efa\u9009\u9879\u6dfb\u52a0\u5230\u7b2c\u4e00\u7ea7\u4e0b\u62c9\u5217\u8868\u4e2d\u3002<\/li>\n
  2. \u7ea7\u522b\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb\u5b9e\u73b0<\/strong>\uff1a\u4e3a\u7b2c\u4e00\u3001\u4e8c\u7ea7\u4e0b\u62c9\u5217\u8868\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u5f53\u9009\u62e9\u9879\u6539\u53d8\u65f6\uff0c\u53d1\u8d77\u65b0\u7684AJAX\u8bf7\u6c42\uff0c\u6839\u636e\u5f53\u524d\u7684\u9009\u62e9\u52a0\u8f7d\u4e0b\u4e00\u7ea7\u7684\u6570\u636e\uff0c\u5e76\u66f4\u65b0\u4e0b\u4e00\u7ea7\u4e0b\u62c9\u5217\u8868\u7684\u5185\u5bb9\u3002<\/li>\n<\/ol>\n
    \u56db\u3001\u4f18\u5316\u7528\u6237\u4f53\u9a8c<\/h3>\n<\/p>\n
    \u52a0\u8f7d\u63d0\u793a<\/h4>\n<\/p>\n
    \u5728\u53d1\u8d77AJAX\u8bf7\u6c42\u671f\u95f4\uff0c\u9002\u5f53\u5730\u5411\u7528\u6237\u663e\u793a\u52a0\u8f7d\u63d0\u793a\uff0c\u53ef\u4ee5\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5728\u4e0b\u62c9\u5217\u8868\u4e2d\u4e34\u65f6\u6dfb\u52a0\u4e00\u4e2a\u8868\u793a\u52a0\u8f7d\u4e2d\u7684\u9009\u9879\u3002<\/p>\n<\/p>\n
    \u9519\u8bef\u5904\u7406<\/h4>\n<\/p>\n
    \u5728AJAX\u8bf7\u6c42\u8fc7\u7a0b\u4e2d\uff0c\u9700\u8981\u8003\u8651\u5230\u7f51\u7edc\u9519\u8bef\u6216\u6570\u636e\u52a0\u8f7d\u5931\u8d25\u7684\u60c5\u51b5\u3002\u5408\u7406\u7684\u9519\u8bef\u5904\u7406\u4e0d\u4ec5\u80fd\u63d0\u5347\u5e94\u7528\u7684\u5065\u58ee\u6027\uff0c\u4e5f\u80fd\u53ca\u65f6\u7ed9\u4e88\u7528\u6237\u53cd\u9988\u3002<\/p>\n<\/p>\n
    \u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u7ed3\u5408AJAX\u5f02\u6b65\u8bf7\u6c42<\/strong>\u3001\u6570\u636e\u5904\u7406\u3001\u4ee5\u53caDOM\u64cd\u4f5c\uff0c\u53ef\u4ee5\u6709\u6548\u5b9e\u73b0\u524d\u7aef\u4e09\u7ea7\u8054\u52a8\u7684\u529f\u80fd\u3002\u8fd9\u4e0d\u4ec5\u63d0\u5347\u4e86\u9875\u9762\u7684\u52a8\u6001\u4ea4\u4e92\u6027\uff0c\u4e5f\u5927\u5927\u589e\u5f3a\u4e86\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<\/p>\n
    \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
    1. \u5982\u4f55\u5728\u524d\u7aef\u4f7f\u7528ajax\u5b9e\u73b0\u4e09\u7ea7\u8054\u52a8\uff1f<\/strong><\/p>\n
    \u4e09\u7ea7\u8054\u52a8\u662f\u6307\u5728\u4e00\u4e2a\u9875\u9762\u4e0a\uff0c\u9009\u62e9\u7b2c\u4e00\u4e2a\u4e0b\u62c9\u6846\u7684\u9009\u9879\uff0c\u4f1a\u52a8\u6001\u52a0\u8f7d\u7b2c\u4e8c\u4e2a\u4e0b\u62c9\u6846\u7684\u5185\u5bb9\uff0c\u9009\u62e9\u7b2c\u4e8c\u4e2a\u4e0b\u62c9\u6846\u7684\u9009\u9879\uff0c\u4f1a\u52a8\u6001\u52a0\u8f7d\u7b2c\u4e09\u4e2a\u4e0b\u62c9\u6846\u7684\u5185\u5bb9\u3002\u8981\u5b9e\u73b0\u8fd9\u4e00\u529f\u80fd\uff0c\u53ef\u4ee5\u4f7f\u7528\u524d\u7aef\u7684ajax\u6280\u672f\u3002<\/p>\n
    \u5728\u524d\u7aef\u9875\u9762\u4e0a\uff0c\u53ef\u4ee5\u4f7f\u7528JavaScript\u7f16\u5199\u4e00\u4e2aajax\u51fd\u6570\uff0c\u5f53\u7b2c\u4e00\u4e2a\u4e0b\u62c9\u6846\u7684\u9009\u9879\u53d1\u751f\u6539\u53d8\u65f6\uff0c\u901a\u8fc7ajax\u51fd\u6570\u53d1\u9001\u540e\u7aef\u8bf7\u6c42\uff0c\u8bf7\u6c42\u540e\u7aef\u63a5\u53e3\u8fd4\u56de\u7b2c\u4e8c\u4e2a\u4e0b\u62c9\u6846\u7684\u5185\u5bb9\u3002\u5728\u63a5\u6536\u5230\u540e\u7aef\u8fd4\u56de\u7684\u6570\u636e\u540e\uff0c\u53ef\u4ee5\u52a8\u6001\u5730\u66f4\u65b0\u7b2c\u4e8c\u4e2a\u4e0b\u62c9\u6846\u7684\u9009\u9879\uff0c\u518d\u6b21\u9009\u62e9\u7b2c\u4e8c\u4e2a\u4e0b\u62c9\u6846\u7684\u9009\u9879\u65f6\uff0c\u518d\u6b21\u901a\u8fc7ajax\u8bf7\u6c42\u83b7\u53d6\u7b2c\u4e09\u4e2a\u4e0b\u62c9\u6846\u7684\u5185\u5bb9\u3002<\/p>\n
    2. \u524d\u7aef ajax \u7f16\u7a0b\u4e2d\u4e09\u7ea7\u8054\u52a8\u7684\u5e38\u89c1\u95ee\u9898\u6709\u54ea\u4e9b\uff1f<\/strong><\/p>\n
    \u5728\u5b9e\u73b0\u524d\u7aef\u7684ajax\u4e09\u7ea7\u8054\u52a8\u65f6\uff0c\u5e38\u89c1\u7684\u95ee\u9898\u5305\u62ec\uff1a<\/p>\n
      \n
    • \n
      \u540e\u7aef\u63a5\u53e3\u8fd4\u56de\u7684\u6570\u636e\u683c\u5f0f\u4e0d\u7b26\u5408\u524d\u7aef\u7684\u9700\u6c42\uff1a\u5728\u8bf7\u6c42\u540e\u7aef\u63a5\u53e3\u65f6\uff0c\u53ef\u80fd\u9700\u8981\u7279\u5b9a\u7684\u53c2\u6570\u683c\u5f0f\u4f20\u9012\u5230\u540e\u7aef\uff0c\u4e14\u540e\u7aef\u8fd4\u56de\u7684\u6570\u636e\u683c\u5f0f\u4e5f\u9700\u8981\u7b26\u5408\u524d\u7aef\u7684\u8981\u6c42\u3002\u5982\u679c\u51fa\u73b0\u683c\u5f0f\u4e0d\u5339\u914d\u7684\u95ee\u9898\uff0c\u9700\u8981\u68c0\u67e5\u524d\u540e\u7aef\u7684\u63a5\u53e3\u5b9a\u4e49\u548c\u6570\u636e\u683c\u5f0f\u662f\u5426\u4e00\u81f4\uff0c\u8fdb\u884c\u8c03\u6574\u3002<\/p>\n<\/li>\n
    • \n
      \u9009\u9879\u5185\u5bb9\u7684\u66f4\u65b0\u95ee\u9898\uff1a\u5728\u4e09\u7ea7\u8054\u52a8\u4e2d\uff0c\u5f53\u9009\u62e9\u4e00\u4e2a\u4e0b\u62c9\u6846\u7684\u9009\u9879\u65f6\uff0c\u9700\u8981\u52a8\u6001\u52a0\u8f7d\u53e6\u4e00\u4e2a\u4e0b\u62c9\u6846\u7684\u5185\u5bb9\u3002\u5728\u66f4\u65b0\u9009\u9879\u5185\u5bb9\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u6e05\u7a7a\u539f\u6709\u7684\u9009\u9879\uff0c\u5e76\u66f4\u65b0\u4e3a\u65b0\u7684\u9009\u9879\u5185\u5bb9\uff0c\u4ee5\u907f\u514d\u51fa\u73b0\u9009\u9879\u5185\u5bb9\u6df7\u4e71\u7684\u95ee\u9898\u3002<\/p>\n<\/li>\n
    • \n
      \u5f02\u6b65\u8bf7\u6c42\u7684\u5904\u7406\u95ee\u9898\uff1a\u7531\u4e8eajax\u662f\u5f02\u6b65\u8bf7\u6c42\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u63a5\u6536\u5230\u6570\u636e\u65f6\uff0c\u524d\u7aef\u9875\u9762\u5df2\u7ecf\u53d1\u751f\u4e86\u53d8\u5316\u3002\u5728\u5904\u7406\u5f02\u6b65\u8bf7\u6c42\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u63a7\u5236\u8bf7\u6c42\u7684\u53d1\u9001\u548c\u63a5\u6536\uff0c\u786e\u4fdd\u6570\u636e\u7684\u51c6\u786e\u6027\u548c\u4e00\u81f4\u6027\u3002<\/p>\n<\/li>\n<\/ul>\n
      3. \u6709\u6ca1\u6709\u6bd4ajax\u66f4\u597d\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u524d\u7aef\u7684\u4e09\u7ea7\u8054\u52a8\uff1f<\/strong><\/p>\n
      \u867d\u7136ajax\u662f\u5b9e\u73b0\u524d\u7aef\u4e09\u7ea7\u8054\u52a8\u7684\u5e38\u7528\u65b9\u5f0f\uff0c\u4f46\u662f\u8fd8\u6709\u5176\u4ed6\u4e00\u4e9b\u6280\u672f\u53ef\u4ee5\u5b9e\u73b0\u76f8\u540c\u7684\u6548\u679c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528Vue\u3001React\u7b49\u524d\u7aef\u6846\u67b6\uff0c\u901a\u8fc7\u6570\u636e\u7ed1\u5b9a\u548c\u72b6\u6001\u7ba1\u7406\u6765\u5b9e\u73b0\u4e09\u7ea7\u8054\u52a8\u3002<\/p>\n
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