{"id":1787,"date":"2024-11-10T10:28:13","date_gmt":"2024-11-10T02:28:13","guid":{"rendered":"https:\/\/fwq.ai\/blog\/1787\/"},"modified":"2024-11-10T10:28:13","modified_gmt":"2024-11-10T02:28:13","slug":"%e5%a6%82%e4%bd%95%e7%94%a8-javascript-%e5%ae%9e%e7%8e%b0%e5%b8%a6%e6%9c%89%e5%9b%be%e6%a0%87%e7%9a%84%e6%96%87%e6%9c%ac%e6%a1%86%e6%a0%a1%e9%aa%8c%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/1787\/","title":{"rendered":"\u5982\u4f55\u7528 JavaScript \u5b9e\u73b0\u5e26\u6709\u56fe\u6807\u7684\u6587\u672c\u6846\u6821\u9a8c\uff1f"},"content":{"rendered":"

\"\u5982\u4f55\u7528<\/p>\n

\u5982\u4f55\u5de7\u7528 javascript \u5b9e\u73b0\u5e26\u6709\u56fe\u6807\u62a5\u9519\u63d0\u9192\u7684\u6587\u672c\u6846\u6821\u9a8c<\/strong><\/p>\n

\u5bf9\u4e8e\u6709\u6587\u672c\u6846\u6821\u9a8c\u9700\u6c42\u7684\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u5982\u4f55\u4f18\u96c5\u5730\u5904\u7406\u9519\u8bef\u4fe1\u606f\u663e\u793a\u5f80\u5f80\u662f\u4e00\u4e2a\u96be\u9898\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u4e00\u79cd\u4f7f\u7528 JavaScript \u5b9e\u73b0\u6587\u672c\u6846\u6821\u9a8c\u7684\u6709\u6548\u65b9\u6cd5\uff0c\u8ba9\u9519\u8bef\u4fe1\u606f\u6e05\u6670\u53ef\u89c1\uff0c\u5e76\u5728\u9519\u8bef\u4fe1\u606f\u524d\u6dfb\u52a0\u81ea\u5b9a\u4e49\u56fe\u6807\u3002<\/p>\n

\u65b9\u6848\u89e3\u6790<\/strong><\/p>\n

\u8981\u5b9e\u73b0\u56fe\u4e2d\u6240\u793a\u7684\u6548\u679c\uff0c\u53ef\u4ee5\u4f7f\u7528 JavaScript \u811a\u672c\uff1a<\/p>\n

    \n
  1. \u521d\u59cb\u5316\u68c0\u6d4b\uff1a<\/strong>\u9875\u9762\u52a0\u8f7d\u65f6\uff0c\u68c0\u67e5\u6587\u672c\u6846\u5185\u5bb9\u662f\u5426\u4e3a\u7a7a\u3002\u5982\u679c\u4e3a\u7a7a\uff0c\u5219\u663e\u793a\u9519\u8bef\u4fe1\u606f\u3002<\/li>\n
  2. \u7528\u6237\u8f93\u5165\u89e6\u53d1\uff1a<\/strong>\u5f53\u7528\u6237\u8f93\u5165\u5185\u5bb9\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528 onBlur \u4e8b\u4ef6\u3002\u5f53\u5149\u6807\u79bb\u5f00\u6587\u672c\u6846\u65f6\uff0c\u89e6\u53d1\u6821\u9a8c\u51fd\u6570\u3002<\/li>\n
  3. \u6821\u9a8c\u51fd\u6570\uff1a<\/strong>\u6821\u9a8c\u51fd\u6570\u83b7\u53d6\u6587\u672c\u6846\u7684 val \u503c\uff0c\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6216\u5176\u4ed6\u89c4\u5219\u8fdb\u884c\u6821\u9a8c\u3002\u5982\u679c\u6821\u9a8c\u5931\u8d25\uff0c\u5219\u663e\u793a\u9519\u8bef\u4fe1\u606f\u3002<\/li>\n<\/ol>\n

    \u5177\u4f53\u5b9e\u73b0<\/strong><\/p>\n

    \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

    \/\/ \u521d\u59cb\u5316\u68c0\u6d4b\nconst input = document.getElementById(\"my-input\");\nif (input.value === \"\") {\n  \/\/ \u663e\u793a\u9519\u8bef\u4fe1\u606f\n  showErrorMessage(\"\u4e0d\u80fd\u4e3a\u7a7a\");\n}\n\n\/\/ \u7528\u6237\u8f93\u5165\u89e6\u53d1\ninput.addEventListener(\"blur\", () => {\n  \/\/ \u83b7\u53d6\u8f93\u5165\u5185\u5bb9\n  const value = input.value;\n\n  \/\/ \u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u8fdb\u884c\u6821\u9a8c\n  if (!\/^[a-zA-Z0-9]+$\/.test(value)) {\n    \/\/ \u6821\u9a8c\u5931\u8d25\uff0c\u663e\u793a\u9519\u8bef\u4fe1\u606f\n    showErrorMessage(\"\u53ea\u80fd\u8f93\u5165\u5b57\u6bcd\u6216\u6570\u5b57\");\n  } else {\n    \/\/ \u6821\u9a8c\u6210\u529f\uff0c\u9690\u85cf\u9519\u8bef\u4fe1\u606f\n    hideErrorMessage();\n  }\n});\n\n\/\/ \u663e\u793a\u9519\u8bef\u4fe1\u606f\nfunction showErrorMessage(message) {\n  const errorMessage = document.createElement(\"div\");\n  errorMessage.textContent = message;\n  errorMessage.style.color = \"red\"; \/\/ \u81ea\u5b9a\u4e49\u9519\u8bef\u4fe1\u606f\u6837\u5f0f\n  errorMessage.insertBefore(\n    createIcon(\"icon-error.png\"),\n    errorMessage.firstChild\n  ); \/\/ \u5728\u9519\u8bef\u4fe1\u606f\u524d\u9762\u63d2\u5165\u56fe\u6807\n  input.parentElement.appendChild(errorMessage);\n}\n\n\/\/ \u9690\u85cf\u9519\u8bef\u4fe1\u606f\nfunction hideErrorMessage() {\n  const errorMessage = input.parentElement.querySelector(\"div\");\n  if (errorMessage) {\n    errorMessage.parentNode.removeChild(errorMessage);\n  }\n}\n\n\/\/ \u521b\u5efa\u56fe\u6807\nfunction createIcon(src) {\n  const icon = document.createElement(\"img\");\n  icon.setAttribute(\"src\", src); \/\/ \u81ea\u5b9a\u4e49\u56fe\u6807\u5730\u5740\n  icon.style.marginRight = \"5px\"; \/\/ \u81ea\u5b9a\u4e49\u56fe\u6807\u6837\u5f0f\n  return icon;\n}<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u8f7b\u677e\u5730\u5b9e\u73b0\u5e26\u6709\u56fe\u6807\u62a5\u9519\u63d0\u9192\u7684\u6587\u672c\u6846\u6821\u9a8c\u529f\u80fd\uff0c\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n
    \u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u7528 JavaScript \u5b9e\u73b0\u5e26\u6709\u56fe\u6807\u7684\u6587\u672c\u6846\u6821\u9a8c\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5982\u4f55\u5de7\u7528 javascript \u5b9e\u73b0\u5e26\u6709\u56fe\u6807\u62a5\u9519\u63d0\u9192\u7684\u6587\u672c\u6846\u6821\u9a8c \u5bf9\u4e8e\u6709\u6587\u672c\u6846\u6821\u9a8c\u9700\u6c42\u7684\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u5982\u4f55\u4f18\u96c5\u5730\u5904\u7406\u9519\u8bef\u4fe1\u606f\u663e\u793a\u5f80\u5f80\u662f\u4e00\u4e2a\u96be\u9898\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u4e00\u79cd\u4f7f\u7528 JavaScript \u5b9e\u73b0\u6587\u672c\u6846\u6821\u9a8c\u7684\u6709\u6548\u65b9\u6cd5\uff0c\u8ba9\u9519\u8bef\u4fe1\u606f\u6e05\u6670\u53ef\u89c1\uff0c\u5e76\u5728\u9519\u8bef\u4fe1\u606f\u524d\u6dfb\u52a0\u81ea\u5b9a\u4e49\u56fe\u6807\u3002 \u65b9\u6848\u89e3\u6790 \u8981\u5b9e\u73b0\u56fe\u4e2d\u6240\u793a\u7684\u6548\u679c\uff0c\u53ef\u4ee5\u4f7f\u7528 JavaScript \u811a\u672c\uff1a \u521d\u59cb\u5316\u68c0\u6d4b\uff1a\u9875\u9762\u52a0\u8f7d\u65f6\uff0c\u68c0\u67e5\u6587\u672c\u6846\u5185\u5bb9\u662f\u5426\u4e3a\u7a7a\u3002\u5982\u679c\u4e3a\u7a7a\uff0c\u5219\u663e\u793a\u9519\u8bef\u4fe1\u606f\u3002 \u7528\u6237\u8f93\u5165\u89e6\u53d1\uff1a\u5f53\u7528\u6237\u8f93\u5165\u5185\u5bb9\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528 onBlur \u4e8b\u4ef6\u3002\u5f53\u5149\u6807\u79bb\u5f00\u6587\u672c\u6846\u65f6\uff0c\u89e6\u53d1\u6821\u9a8c\u51fd\u6570\u3002 \u6821\u9a8c\u51fd\u6570\uff1a\u6821\u9a8c\u51fd\u6570\u83b7\u53d6\u6587\u672c\u6846\u7684 val \u503c\uff0c\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6216\u5176\u4ed6\u89c4\u5219\u8fdb\u884c\u6821\u9a8c\u3002\u5982\u679c\u6821\u9a8c\u5931\u8d25\uff0c\u5219\u663e\u793a\u9519\u8bef\u4fe1\u606f\u3002 \u5177\u4f53\u5b9e\u73b0 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \/\/ \u521d\u59cb\u5316\u68c0\u6d4b const input = document.getElementById(“my-input”); if (input.value === “”) { \/\/ \u663e\u793a\u9519\u8bef\u4fe1\u606f showErrorMessage(“\u4e0d\u80fd\u4e3a\u7a7a”); } \/\/ \u7528\u6237\u8f93\u5165\u89e6\u53d1 input.addEventListener(“blur”, () => { \/\/ \u83b7\u53d6\u8f93\u5165\u5185\u5bb9 const value = input.value; \/\/ \u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u8fdb\u884c\u6821\u9a8c if (!\/^[a-zA-Z0-9]+$\/.test(value)) { \/\/ \u6821\u9a8c\u5931\u8d25\uff0c\u663e\u793a\u9519\u8bef\u4fe1\u606f showErrorMessage(“\u53ea\u80fd\u8f93\u5165\u5b57\u6bcd\u6216\u6570\u5b57”); } […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-1787","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/1787","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=1787"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/1787\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=1787"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=1787"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=1787"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}