{"id":6252,"date":"2017-07-05T02:03:58","date_gmt":"2017-07-04T18:03:58","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=6252"},"modified":"2018-10-26T21:00:35","modified_gmt":"2018-10-26T13:00:35","slug":"js-text-string-download-as-html-json-file","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2017\/07\/js-text-string-download-as-html-json-file\/","title":{"rendered":"JS\u524d\u7aef\u521b\u5efahtml\u6216json\u6587\u4ef6\u5e76\u6d4f\u89c8\u5668\u5bfc\u51fa\u4e0b\u8f7d"},"content":{"rendered":"

by zhangxinxu<\/a> from https:\/\/www.zhangxinxu.com\/wordpress\/?p=6252<\/a>
\n\u672c\u6587\u53ef\u5168\u6587\u8f6c\u8f7d\uff0c\u4f46\u9700\u5f97\u5230\u539f\u4f5c\u8005\u4e66\u9762\u8bb8\u53ef\uff0c\u540c\u65f6\u4fdd\u7559\u539f\u4f5c\u8005\u548c\u51fa\u5904\uff0c\u6458\u8981\u5f15\u6d41\u5219\u968f\u610f\u3002<\/p>\n

\u4e00\u3001HTML\u4e0e\u6587\u4ef6\u4e0b\u8f7d<\/h3>\n

\u5982\u679c\u5e0c\u671b\u5728\u524d\u7aef\u4fa7\u76f4\u63a5\u89e6\u53d1\u67d0\u4e9b\u8d44\u6e90\u7684\u4e0b\u8f7d\uff0c\u6700\u65b9\u4fbf\u5feb\u6377\u7684\u65b9\u6cd5\u5c31\u662f\u4f7f\u7528HTML5\u539f\u751f\u7684download<\/code>\u5c5e\u6027\uff0c\u4f8b\u5982\uff1a<\/p>\n

<a href=\"large.jpg\" download<\/span>>\u4e0b\u8f7d<\/a><\/pre>\n
\u5177\u4f53\u4ecb\u7ecd\u53ef\u53c2\u8003\u6211\u4e4b\u524d\u7684\u6587\u7ae0\uff1a\u201c\u4e86\u89e3HTML\/HTML5\u4e2d\u7684download\u5c5e\u6027<\/a>\u201d\u3002<\/p>\n
\u4f46\u663e\u7136\uff0c\u5982\u679c\u7eaf\u7cb9\u5229\u7528HTML\u5c5e\u6027\u6765\u5b9e\u73b0\u6587\u4ef6\u7684\u4e0b\u8f7d\uff08\u800c\u4e0d\u662f\u6d4f\u89c8\u5668\u6253\u5f00\u6216\u6d4f\u89c8\uff09\uff0c\u5bf9\u4e8e\u52a8\u6001\u5185\u5bb9\uff0c\u5c31\u65e0\u80fd\u4e3a\u529b\u3002<\/p>\n
\u4f8b\u5982\uff0c\u6211\u4eec\u5bf9\u9875\u9762\u8fdb\u884c\u5206\u4eab\u7684\u65f6\u5019\uff0c\u5e0c\u671b\u5206\u4eab\u56fe\u7247\u662f\u9875\u9762\u5185\u5bb9\u7684\u5b9e\u65f6\u622a\u56fe\uff0c\u6b64\u65f6\uff0c\u8fd9\u4e2a\u56fe\u7247\u5c31\u662f\u52a8\u6001\u7684\uff0c\u7eafHTML\u663e\u7136\u662f\u65e0\u6cd5\u6ee1\u8db3\u6211\u4eec\u7684\u9700\u6c42\u7684\uff0c\u501f\u52a9JS\u548c\u5176\u5b83\u4e00\u4e9bHTML5\u7279\u6027\uff0c\u4f8b\u5982\uff0c\u5c06\u9875\u9762\u5143\u7d20\u8f6c\u6362\u5230canvas<\/code>\u4e0a\uff0c\u7136\u540e\u518d\u8f6c\u6210\u56fe\u7247\u8fdb\u884c\u4e0b\u8f7d\u3002<\/p>\n
\u4f46\u672c\u6587\u8981\u4ecb\u7ecd\u7684\u4e0b\u8f7d\u4e0d\u662f\u56fe\u7247\u7684\u4e0b\u8f7d\uff0c\u800c\u662f\u6587\u672c\u4fe1\u606f\u7684\u4e0b\u8f7d\uff0c\u6240\u9700\u8981\u4f7f\u7528\u7684HTML\u7279\u6027\u4e0d\u662fcanvas<\/code>\uff0c\u800c\u662f\u5176\u5b83\u3002<\/p>\n
\u4e8c\u3001\u501f\u52a9HTML5 Blob\u5b9e\u73b0\u6587\u672c\u4fe1\u606f\u6587\u4ef6\u4e0b\u8f7d<\/h3>\n
\u5982\u679c\u5bf9Blob\u4e0d\u4e86\u89e3\uff0c\u53ef\u4ee5\u5148\u770b\u770b\u6211\u597d\u4e9b\u5e74\u4e4b\u524d\u5199\u7684\u201c\u7406\u89e3DOMString\u3001Document\u3001FormData\u3001Blob\u3001File\u3001ArrayBuffer\u6570\u636e\u7c7b\u578b<\/a>\u201d\u4e00\u6587\u3002<\/p>\n
\u539f\u7406\u5176\u5b9e\u5f88\u7b80\u5355\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u6587\u672c\u6216\u8005JS\u5b57\u7b26\u4e32\u4fe1\u606f\u501f\u52a9Blob\u8f6c\u6362\u6210\u4e8c\u8fdb\u5236\uff0c\u7136\u540e\uff0c\u4f5c\u4e3a<a><\/code>\u5143\u7d20\u7684href<\/code>\u5c5e\u6027\uff0c\u914d\u5408download<\/code>\u5c5e\u6027\uff0c\u5b9e\u73b0\u4e0b\u8f7d\u3002<\/p>\n
\u4ee3\u7801\u4e5f\u6bd4\u8f83\u7b80\u5355\uff0c\u5982\u4e0b\u793a\u610f\uff08\u517c\u5bb9Chrome\u548cFirefox\uff09\uff1a<\/p>\n
var funDownload = function (content, filename) {\n    \/\/ \u521b\u5efa\u9690\u85cf\u7684\u53ef\u4e0b\u8f7d\u94fe\u63a5<\/span>\n    var eleLink = document.createElement('a');\n    eleLink.download = filename;\n    eleLink.style.display = 'none';\n    \/\/ \u5b57\u7b26\u5185\u5bb9\u8f6c\u53d8\u6210blob\u5730\u5740<\/span>\n    var blob = new Blob([content]);\n    eleLink.href = URL.createObjectURL(blob);\n    \/\/ \u89e6\u53d1\u70b9\u51fb<\/span>\n    document.body.appendChild(eleLink);\n    eleLink.click();\n    \/\/ \u7136\u540e\u79fb\u9664<\/span>\n    document.body.removeChild(eleLink);\n};<\/pre>\n
\u5176\u4e2d\uff0ccontent<\/code>\u6307\u9700\u8981\u4e0b\u8f7d\u7684\u6587\u672c\u6216\u5b57\u7b26\u4e32\u5185\u5bb9\uff0cfilename<\/code>\u6307\u4e0b\u8f7d\u5230\u7cfb\u7edf\u4e2d\u7684\u6587\u4ef6\u540d\u79f0\u3002<\/p>\n
\u4e07\u822c\u8a00\u8bed\u4e0d\u8fbe\u610f\uff0c\u4e00\u679a\u5b9e\u4f8b\u6765\u8d70\u5fc3\u3002<\/p>\n
\u70b9\u51fb\u201c\u4e0b\u8f7d\u201d\u6309\u94ae\uff0c\u4f1a\u628a\u6587\u672c\u57df\u4e2d\u7684\u5185\u5bb9\u5168\u90e8\u4f5c\u4e3a\u4e00\u4e2a.html<\/code>\u540e\u7f00\u6587\u4ef6\u4e0b\u8f7d\u4e0b\u6765\uff0c\u5404\u6d41\u7a0b\u6548\u679c\u5982\u4e0b\u9762\u51e0\u5f20\u56fe\uff1a<\/p>\n
\"\u4e0b\u8f7d\u6309\u94ae\u70b9\u51fb\u793a\u610f\"<\/p>\n
\u51fa\u73b0\u4e0b\u8f7d\u786e\u8ba4\u6846\uff08\u6839\u636e\u6d4f\u89c8\u5668\u7684\u8bbe\u7f6e\u4e0d\u540c\u4e5f\u53ef\u80fd\u76f4\u63a5\u4e0b\u8f7d\uff09\uff0c\u7136\u540e\u540d\u79f0\u9ed8\u8ba4\u5c31\u662ftest.html<\/code>\u3002<\/p>\n
\"\u9ed8\u8ba4\u5c31\u662ftest.html\u540d\u79f0\"<\/p>\n
\u7136\u540e\u5bf9\u5e94\u4fdd\u5b58\u76ee\u5f55\u5c31\u591a\u4e86\u4e2a\u7c7b\u4f3c\u4e0b\u56fe\u7684\u6587\u4ef6\uff1a<\/p>\n
\"\u4fdd\u5b58\u597d\u7684test.html\u6587\u4ef6\u622a\u56fe\u793a\u610f\"<\/p>\n
\u53cc\u51fb\u8be5test.html<\/code>\u6587\u4ef6\u53ef\u4ee5\u5728\u6d4f\u89c8\u5668\u4e2d\u6b63\u5e38\u6d4f\u89c8\uff0c\u8bf4\u660e\uff0c\u4fdd\u5b58\u4fe1\u606f\u65e0\u8bef\u3002<\/p>\n
\"test.html\u5728\u6d4f\u89c8\u5668\u4e2d\u8bbf\u95ee\u7684\u6548\u679c\"<\/p>\n
\u89e6\u53d1\u4e0b\u8f7d\u7684JS\u4ee3\u7801\u5c31\u51e0\u884c\uff1a<\/p>\n
button.addEventListener('click', function () {\n    funDownload(textarea.value, 'test.html');\t\n});<\/pre>\n
\u4e09\u3001\u501f\u52a9Base64\u5b9e\u73b0\u4efb\u610f\u6587\u4ef6\u4e0b\u8f7d<\/h3>\n
\u5bf9\u4e8e\u975e\u6587\u672c\u6587\u4ef6\uff0c\u4e5f\u662f\u53ef\u4ee5\u76f4\u63a5JS\u89e6\u53d1\u4e0b\u8f7d\u7684\uff0c\u4f8b\u5982\uff0c\u5982\u679c\u6211\u4eec\u60f3\u4e0b\u8f7d\u4e00\u5f20\u56fe\u7247\uff0c\u53ef\u4ee5\u628a\u8fd9\u5f20\u56fe\u7247\u8f6c\u6362\u6210base64\u683c\u5f0f\uff0c\u7136\u540e\u4e0b\u8f7d\u3002<\/p>\n
\u4ee3\u7801\u793a\u610f\uff1a<\/p>\n
var funDownload = function (domImg, filename) {\n    \/\/ \u521b\u5efa\u9690\u85cf\u7684\u53ef\u4e0b\u8f7d\u94fe\u63a5<\/span>\n    var eleLink = document.createElement('a');\n    eleLink.download = filename;\n    eleLink.style.display = 'none';\n    \/\/ \u56fe\u7247\u8f6cbase64\u5730\u5740<\/span>\n    var canvas = document.createElement('canvas');\n    var context = canvas.getContext('2d');\n    var width = domImg.naturalWidth;\n    var height = domImg.naturalHeight;\n    context.drawImage(domImg, 0, 0);\n    \/\/ \u5982\u679c\u662fPNG\u56fe\u7247\uff0c\u5219canvas.toDataURL('image\/png')<\/span>\n    eleLink.href = canvas.toDataURL('image\/jpeg');\n    \/\/ \u89e6\u53d1\u70b9\u51fb<\/span>\n    document.body.appendChild(eleLink);\n    eleLink.click();\n    \/\/ \u7136\u540e\u79fb\u9664<\/span>\n    document.body.removeChild(eleLink);\n};<\/pre>\n
\u56db\u3001\u7ed3\u675f\u8bed<\/h3>\n
\u4e0d\u6b62\u662f.html<\/code>\u6587\u4ef6\uff0c.txt<\/code>, .json<\/code>\u7b49\u53ea\u8981\u5185\u5bb9\u662f\u6587\u672c\u7684\u6587\u4ef6\uff0c\u90fd\u662f\u53ef\u4ee5\u5229\u7528\u8fd9\u79cd\u5c0f\u6280\u5de7\u5b9e\u73b0\u4e0b\u8f7d\u7684\u3002<\/p>\n
\u5728Chrome\u6d4f\u89c8\u5668\u4e0b\uff0c\u6a21\u62df\u70b9\u51fb\u521b\u5efa\u7684<a><\/code>\u5143\u7d20\u5373\u4f7f\u4e0dappend<\/code>\u5230\u9875\u9762\u4e2d\uff0c\u4e5f\u662f\u53ef\u4ee5\u89e6\u53d1\u4e0b\u8f7d\u7684\uff0c\u4f46\u662f\u5728Firefox\u6d4f\u89c8\u5668\u4e2d\u5374\u4e0d\u884c\uff0c\u56e0\u6b64\uff0c\u4e0a\u9762\u7684funDownload()<\/code>\u65b9\u6cd5\u6709\u4e00\u4e2aappendChild<\/code>\u548cremoveChild<\/code>\u7684\u5904\u7406\uff0c\u5c31\u662f\u4e3a\u4e86\u517c\u5bb9Firefox\u6d4f\u89c8\u5668\u3002<\/p>\n
download<\/code>\u5c5e\u6027\u4eceEdge13\u5f00\u59cb\u652f\u6301\uff0c\u7406\u8bba\u4e0a\uff0cedge\u4e5f\u5e94\u8be5\u652f\u6301\u76f4\u63a5JS\u89e6\u53d1\u7684\u6d4f\u89c8\u5668\u6587\u4ef6\u4e0b\u8f7d\uff0c\u4f46\u6211\u624b\u5934\u4e0a\u5e76\u65e0\u76f8\u5173\u6d4f\u89c8\u5668\uff0c\u65e0\u6cd5\u786e\u5b9a\u771f\u5b9e\u60c5\u51b5\u5982\u4f55\uff0c\u6b22\u8fce\u6709\u6761\u4ef6\u7684\u5c0f\u4f19\u4f34\u5e2e\u5fd9\u6d4b\u4e0b\u544a\u77e5\u7ed3\u679c\u3002<\/p>\n
\u611f\u8c22arrow<\/em>\u7684\u53cd\u9988\uff1a<\/p>\n
edge\u4e0b\u8f7d\u5b8c\u5c31\u751f\u6210\u4e00\u4e2a\u6587\u4ef6\uff0c\u7c7b\u4f3cGUID\u547d\u540d\u7684\uff0c\u52a0\u4e2a\u540e\u7f00\u5c31\u6b63\u5e38\u4e86\u3002<\/p><\/blockquote>\n
\u5c31\u8fd9\u4e9b\u5427\uff0c\u611f\u8c22\u9605\u8bfb\uff01<\/p>\n
<\/p>\n
\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u4f1a\u7ecf\u5e38\u66f4\u65b0\u77e5\u8bc6\u70b9\u4ee5\u53ca\u4fee\u6b63\u4e00\u4e9b\u9519\u8bef\uff0c\u56e0\u6b64\u8f6c\u8f7d\u8bf7\u4fdd\u7559\u539f\u51fa\u5904\uff0c\u65b9\u4fbf\u6eaf\u6e90\uff0c\u907f\u514d\u9648\u65e7\u9519\u8bef\u77e5\u8bc6\u7684\u8bef\u5bfc\uff0c\u540c\u65f6\u6709\u66f4\u597d\u7684\u9605\u8bfb\u4f53\u9a8c\u3002
\n\u672c\u6587\u5730\u5740\uff1ahttp:\/\/www.zhangxinxu.com\/wordpress\/?p=6252<\/a><\/p>\n
\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6211\u4eec\u4f7f\u7528JS\u521b\u5efa\u4e86\u4e00\u4e2a\u52a8\u6001\u7684JSON\u6570\u636e\uff0c\u5e0c\u671b\u53ef\u4ee5\u4fdd\u5b58\u4e3aJSON\u6587\u4ef6\u5230\u672c\u673a\u7cfb\u7edf\uff0c\u4f20\u7edf\u505a\u6cd5\u53ef\u80fd\u9700\u8981\u590d\u5236\u7c98\u8d34\uff0c\u800c\u5b9e\u9645\u4e0a\uff0c\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528JS\u76f4\u63a5\u521b\u5efa\u5bf9\u5e94\u7684JSON\u6587\u4ef6\u5e76\u8ba9\u6d4f\u89c8\u5668\u4e0b\u8f7d\uff0c\u800c\u4e14\u4ee3\u7801\u548c\u539f\u7406\u90fd\u51fa\u4e4e\u610f\u6599\u7684\u7b80\u5355\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[896,180],"tags":[872,53,1051,553],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/6252"}],"collection":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/comments?post=6252"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/6252\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=6252"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=6252"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=6252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a\u57fa\u4e8efunDownload\u5b9e\u73b0\u7684html\u683c\u5f0f\u6587\u4ef6\u4e0b\u8f7ddemo<\/a><\/p>\n