{"id":2151,"date":"2025-03-01T00:19:21","date_gmt":"2025-02-28T16:19:21","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2151"},"modified":"2025-03-01T00:19:21","modified_gmt":"2025-02-28T16:19:21","slug":"javascript-%e5%bc%b9%e7%aa%97","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/01\/javascript-%e5%bc%b9%e7%aa%97\/","title":{"rendered":"JavaScript \u5f39\u7a97"},"content":{"rendered":"\n

JavaScript \u63d0\u4f9b\u4e86\u51e0\u79cd\u7528\u4e8e\u663e\u793a\u5f39\u7a97\uff08\u5bf9\u8bdd\u6846\uff09\u7684\u5185\u7f6e\u65b9\u6cd5\uff0c\u901a\u5e38\u7528\u4e8e\u4e0e\u7528\u6237\u8fdb\u884c\u4ea4\u4e92\u3001\u663e\u793a\u4fe1\u606f\u6216\u8981\u6c42\u7528\u6237\u505a\u51fa\u67d0\u79cd\u54cd\u5e94\u3002\u4e3b\u8981\u7684\u5f39\u7a97\u65b9\u6cd5\u5305\u62ec alert()<\/code>\u3001confirm()<\/code> \u548c prompt()<\/code>\u3002\u5b83\u4eec\u90fd\u5c5e\u4e8e window<\/code> \u5bf9\u8c61\u7684\u4e00\u90e8\u5206\u3002<\/p>\n\n\n\n

1. alert()<\/code> \u65b9\u6cd5<\/strong><\/h3>\n\n\n\n

alert()<\/code> \u662f\u6700\u7b80\u5355\u7684\u5f39\u7a97\u65b9\u6cd5\uff0c\u7528\u4e8e\u663e\u793a\u4e00\u4e2a\u5305\u542b\u6d88\u606f\u548c\u201c\u786e\u5b9a\u201d\u6309\u94ae\u7684\u8b66\u544a\u6846\u3002\u8be5\u65b9\u6cd5\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u7528\u6237\u70b9\u51fb\u786e\u5b9a\u6309\u94ae\u540e\uff0c\u5f39\u7a97\u4f1a\u81ea\u52a8\u5173\u95ed\u3002<\/p>\n\n\n\n

\u7528\u6cd5\uff1a<\/strong><\/p>\n\n\n\n

alert(\"This is an alert message!\");<\/code><\/pre>\n\n\n\n
\u6548\u679c\uff1a<\/strong>
\u5f39\u51fa\u4e00\u4e2a\u5bf9\u8bdd\u6846\uff0c\u5185\u5bb9\u4e3a “This is an alert message!”\uff0c\u5e76\u4e14\u6709\u4e00\u4e2a\u201c\u786e\u5b9a\u201d\u6309\u94ae\u3002<\/p>\n\n\n\n
\u7528\u9014\uff1a<\/strong><\/p>\n\n\n\n
    \n
  • \u7528\u4e8e\u5411\u7528\u6237\u663e\u793a\u8b66\u544a\u4fe1\u606f\u3002<\/li>\n\n\n\n
  • \u7528\u4e8e\u8c03\u8bd5\uff0c\u6682\u65f6\u6027\u5730\u663e\u793a\u4fe1\u606f\u3002<\/li>\n<\/ul>\n\n\n\n
    2. confirm()<\/code> \u65b9\u6cd5<\/strong><\/h3>\n\n\n\n
    confirm()<\/code> \u5f39\u7a97\u4f1a\u663e\u793a\u4e00\u4e2a\u5305\u542b\u6d88\u606f\u3001”\u786e\u5b9a” \u548c “\u53d6\u6d88” \u6309\u94ae\u7684\u5bf9\u8bdd\u6846\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\uff1a\u5982\u679c\u7528\u6237\u70b9\u51fb\u201c\u786e\u5b9a\u201d\u6309\u94ae\uff0c\u5219\u8fd4\u56de true<\/code>\uff1b\u5982\u679c\u70b9\u51fb\u201c\u53d6\u6d88\u201d\u6309\u94ae\uff0c\u5219\u8fd4\u56de false<\/code>\u3002<\/p>\n\n\n\n
    \u7528\u6cd5\uff1a<\/strong><\/p>\n\n\n\n
    var result = confirm(\"Are you sure you want to proceed?\");\nif (result) {\n  console.log(\"User clicked OK\");\n} else {\n  console.log(\"User clicked Cancel\");\n}<\/code><\/pre>\n\n\n\n
    \u6548\u679c\uff1a<\/strong>
    \u5f39\u51fa\u4e00\u4e2a\u5bf9\u8bdd\u6846\uff0c\u5185\u5bb9\u4e3a “Are you sure you want to proceed?”\uff0c\u5e76\u4e14\u6709\u4e24\u4e2a\u6309\u94ae\uff1a\u201c\u786e\u5b9a\u201d\u548c\u201c\u53d6\u6d88\u201d\u3002<\/p>\n\n\n\n
    \u7528\u9014\uff1a<\/strong><\/p>\n\n\n\n
      \n
    • \u7528\u4e8e\u8981\u6c42\u7528\u6237\u786e\u8ba4\u67d0\u4e2a\u64cd\u4f5c\uff0c\u7c7b\u4f3c\u4e8e\u786e\u8ba4\u5220\u9664\u3001\u786e\u8ba4\u63d0\u4ea4\u7b49\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n
      3. prompt()<\/code> \u65b9\u6cd5<\/strong><\/h3>\n\n\n\n
      prompt()<\/code> \u5f39\u7a97\u5141\u8bb8\u7528\u6237\u8f93\u5165\u4fe1\u606f\u5e76\u8fd4\u56de\u8be5\u8f93\u5165\u503c\u3002\u8be5\u65b9\u6cd5\u663e\u793a\u4e00\u4e2a\u5305\u542b\u6d88\u606f\u3001\u8f93\u5165\u6846\u548c\u201c\u786e\u5b9a\u201d\u548c\u201c\u53d6\u6d88\u201d\u6309\u94ae\u7684\u5bf9\u8bdd\u6846\u3002\u5982\u679c\u7528\u6237\u70b9\u51fb\u201c\u786e\u5b9a\u201d\u6309\u94ae\uff0c\u8fd4\u56de\u8f93\u5165\u7684\u6587\u672c\uff1b\u5982\u679c\u70b9\u51fb\u201c\u53d6\u6d88\u201d\u6309\u94ae\uff0c\u8fd4\u56de null<\/code>\u3002<\/p>\n\n\n\n
      \u7528\u6cd5\uff1a<\/strong><\/p>\n\n\n\n
      var name = prompt(\"What is your name?\", \"John Doe\");\nif (name != null) {\n  console.log(\"Hello, \" + name);\n} else {\n  console.log(\"User canceled the input\");\n}<\/code><\/pre>\n\n\n\n
      \u6548\u679c\uff1a<\/strong>
      \u5f39\u51fa\u4e00\u4e2a\u5bf9\u8bdd\u6846\uff0c\u5185\u5bb9\u4e3a “What is your name?”\uff0c\u5e76\u4e14\u6709\u4e00\u4e2a\u8f93\u5165\u6846\u3002\u9ed8\u8ba4\u503c\u662f “John Doe”\uff08\u53ef\u4ee5\u4fee\u6539\uff09\uff0c\u7528\u6237\u53ef\u4ee5\u8f93\u5165\u81ea\u5df1\u7684\u540d\u5b57\u6216\u70b9\u51fb\u201c\u53d6\u6d88\u201d\u3002<\/p>\n\n\n\n
      \u7528\u9014\uff1a<\/strong><\/p>\n\n\n\n
        \n
      • \u7528\u4e8e\u83b7\u53d6\u7528\u6237\u7684\u8f93\u5165\u4fe1\u606f\u3002<\/li>\n\n\n\n
      • \u7528\u4e8e\u6536\u96c6\u7528\u6237\u7684\u52a8\u6001\u8f93\u5165\uff0c\u4f8b\u5982\u7528\u6237\u540d\u3001\u641c\u7d22\u5185\u5bb9\u7b49\u3002<\/li>\n<\/ul>\n\n\n\n
        4. \u81ea\u5b9a\u4e49\u5f39\u7a97<\/strong><\/h3>\n\n\n\n
        \u9664\u4e86\u4f7f\u7528 alert()<\/code>\u3001confirm()<\/code> \u548c prompt()<\/code>\uff0c\u4f60\u8fd8\u53ef\u4ee5\u901a\u8fc7 CSS \u548c JavaScript \u521b\u5efa\u81ea\u5b9a\u4e49\u7684\u5f39\u7a97\uff08\u6a21\u6001\u6846\uff09\u3002\u8fd9\u79cd\u65b9\u6cd5\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u63a7\u5236\uff0c\u5141\u8bb8\u4f60\u66f4\u7cbe\u786e\u5730\u5b9a\u4e49\u5f39\u7a97\u7684\u5916\u89c2\u548c\u884c\u4e3a\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u6a21\u6001\u6846\u5b9e\u73b0\u793a\u4f8b\uff1a<\/p>\n\n\n\n
        <!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  <meta charset=\"UTF-8\">\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n  <title>Custom Modal<\/title>\n  <style>\n    \/* \u5f39\u7a97\u7684\u80cc\u666f *\/\n    .modal {\n      display: none; \/* \u9ed8\u8ba4\u4e0d\u663e\u793a *\/\n      position: fixed;\n      z-index: 1;\n      left: 0;\n      top: 0;\n      width: 100%;\n      height: 100%;\n      background-color: rgba(0, 0, 0, 0.4); \/* \u534a\u900f\u660e\u80cc\u666f *\/\n    }\n\n    \/* \u5f39\u7a97\u7684\u5185\u5bb9 *\/\n    .modal-content {\n      background-color: white;\n      margin: 15% auto;\n      padding: 20px;\n      border: 1px solid #888;\n      width: 80%;\n    }\n\n    \/* \u5173\u95ed\u6309\u94ae *\/\n    .close {\n      color: #aaa;\n      float: right;\n      font-size: 28px;\n      font-weight: bold;\n    }\n\n    .close:hover,\n    .close:focus {\n      color: black;\n      text-decoration: none;\n      cursor: pointer;\n    }\n  <\/style>\n<\/head>\n<body>\n\n  <h2>Custom Modal Example<\/h2>\n\n  <!-- \u89e6\u53d1\u6309\u94ae -->\n  <button id=\"myBtn\">Open Modal<\/button>\n\n  <!-- \u5f39\u7a97 -->\n  <div id=\"myModal\" class=\"modal\">\n    <div class=\"modal-content\">\n      <span class=\"close\">&times;<\/span>\n      <p>This is a custom modal popup!<\/p>\n    <\/div>\n  <\/div>\n\n  <script>\n    \/\/ \u83b7\u53d6\u5f39\u7a97\u548c\u6309\u94ae\u5143\u7d20\n    var modal = document.getElementById(\"myModal\");\n    var btn = document.getElementById(\"myBtn\");\n    var span = document.getElementsByClassName(\"close\")[0];\n\n    \/\/ \u70b9\u51fb\u6309\u94ae\u65f6\u6253\u5f00\u5f39\u7a97\n    btn.onclick = function() {\n      modal.style.display = \"block\";\n    }\n\n    \/\/ \u70b9\u51fb\u5173\u95ed\u6309\u94ae\u65f6\u5173\u95ed\u5f39\u7a97\n    span.onclick = function() {\n      modal.style.display = \"none\";\n    }\n\n    \/\/ \u70b9\u51fb\u5f39\u7a97\u5916\u90e8\u65f6\u5173\u95ed\u5f39\u7a97\n    window.onclick = function(event) {\n      if (event.target == modal) {\n        modal.style.display = \"none\";\n      }\n    }\n  <\/script>\n\n<\/body>\n<\/html><\/code><\/pre>\n\n\n\n
        \u6548\u679c\uff1a<\/strong>
        \u70b9\u51fb “Open Modal” \u6309\u94ae\u65f6\uff0c\u4f1a\u5f39\u51fa\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u6a21\u6001\u6846\uff0c\u6a21\u6001\u6846\u4e2d\u663e\u793a “This is a custom modal popup!”\u3002\u7528\u6237\u53ef\u4ee5\u70b9\u51fb\u53f3\u4e0a\u89d2\u7684\u5173\u95ed\u6309\u94ae\uff08&times;<\/code>\uff09\u6216\u70b9\u51fb\u5f39\u7a97\u5916\u90e8\u533a\u57df\u5173\u95ed\u5f39\u7a97\u3002<\/p>\n\n\n\n
        \u7528\u9014\uff1a<\/strong><\/p>\n\n\n\n
          \n
        • \u7528\u4e8e\u663e\u793a\u91cd\u8981\u4fe1\u606f\u3001\u8868\u5355\u6216\u8fdb\u884c\u7528\u6237\u786e\u8ba4\u64cd\u4f5c\u3002<\/li>\n\n\n\n
        • \u63d0\u4f9b\u66f4\u591a\u5b9a\u5236\u5316\u7684\u754c\u9762\u548c\u4ea4\u4e92\u3002<\/li>\n<\/ul>\n\n\n\n
          5. \u603b\u7ed3<\/strong><\/h3>\n\n\n\n
            \n
          • alert()<\/code><\/strong>\uff1a\u663e\u793a\u4e00\u4e2a\u7b80\u5355\u7684\u63d0\u793a\u6846\uff0c\u53ea\u5305\u542b\u4e00\u4e2a\u201c\u786e\u5b9a\u201d\u6309\u94ae\u3002<\/li>\n\n\n\n
          • confirm()<\/code><\/strong>\uff1a\u663e\u793a\u4e00\u4e2a\u786e\u8ba4\u6846\uff0c\u5305\u542b\u201c\u786e\u5b9a\u201d\u548c\u201c\u53d6\u6d88\u201d\u6309\u94ae\uff0c\u8fd4\u56de\u7528\u6237\u9009\u62e9\u7684\u5e03\u5c14\u503c\u3002<\/li>\n\n\n\n
          • prompt()<\/code><\/strong>\uff1a\u663e\u793a\u4e00\u4e2a\u8f93\u5165\u6846\uff0c\u5141\u8bb8\u7528\u6237\u8f93\u5165\u4fe1\u606f\u5e76\u8fd4\u56de\u8f93\u5165\u7684\u503c\u3002<\/li>\n\n\n\n
          • \u81ea\u5b9a\u4e49\u5f39\u7a97<\/strong>\uff1a\u4f7f\u7528 HTML\u3001CSS \u548c JavaScript \u521b\u5efa\u66f4\u4e3a\u590d\u6742\u548c\u5b9a\u5236\u7684\u5f39\u7a97\u3002<\/li>\n<\/ul>\n\n\n\n
            JavaScript \u63d0\u4f9b\u4e86\u591a\u79cd\u7c7b\u578b\u7684\u5f39\u7a97\uff0c\u5b83\u4eec\u5728\u7f51\u9875\u4ea4\u4e92\u4e2d\u626e\u6f14\u7740\u91cd\u8981\u89d2\u8272\uff0c\u53ef\u4ee5\u5e2e\u52a9\u5f00\u53d1\u8005\u4e0e\u7528\u6237\u8fdb\u884c\u6709\u6548\u7684\u6c9f\u901a\u548c\u4e92\u52a8\u3002\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
            JavaScript \u63d0\u4f9b\u4e86\u51e0\u79cd\u7528\u4e8e\u663e\u793a\u5f39\u7a97\uff08\u5bf9\u8bdd\u6846\uff09\u7684\u5185\u7f6e\u65b9\u6cd5\uff0c\u901a\u5e38\u7528\u4e8e\u4e0e\u7528\u6237\u8fdb\u884c\u4ea4\u4e92\u3001\u663e\u793a\u4fe1\u606f\u6216\u8981\u6c42\u7528\u6237\u505a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"class_list":["post-2151","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2151","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2151"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2151\/revisions"}],"predecessor-version":[{"id":2152,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2151\/revisions\/2152"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2151"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2151"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}