{"id":3228,"date":"2024-11-10T11:21:02","date_gmt":"2024-11-10T03:21:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/3228\/"},"modified":"2024-11-10T11:21:02","modified_gmt":"2024-11-10T03:21:02","slug":"js%e5%a6%82%e4%bd%95%e5%8e%8b%e7%bc%a9%e5%9b%be%e7%89%87","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/3228\/","title":{"rendered":"js\u5982\u4f55\u538b\u7f29\u56fe\u7247"},"content":{"rendered":"<blockquote><p>\n  javascript \u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u538b\u7f29\u56fe\u50cf\u4ee5\u4f18\u5316\u7f51\u7ad9\u548c\u5e94\u7528\u7a0b\u5e8f\u7684\u52a0\u8f7d\u901f\u5ea6\uff1a\u4f7f\u7528 canvas \u5143\u7d20\u5c06\u56fe\u50cf\u7ed8\u5236\u5230\u753b\u5e03\u4e0a\uff0c\u5e76\u901a\u8fc7 todataurl() \u65b9\u6cd5\u83b7\u53d6\u7f29\u5c0f\u7684\u56fe\u50cf\u6570\u636e\u3002\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\uff08\u5982 image compressor\u3001tinypng \u6216 jpegmini\uff09\u538b\u7f29\u56fe\u50cf\u3002\u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u52a0\u8f7d\u56fe\u50cf\u3001\u538b\u7f29\u56fe\u50cf\u5e76\u4fdd\u5b58\u538b\u7f29\u540e\u7684\u56fe\u50cf\uff0c\u4ece\u800c\u51cf\u5c11\u56fe\u50cf\u6587\u4ef6\u5927\u5c0f\uff0c\u4f18\u5316\u52a0\u8f7d\u901f\u5ea6\uff0c\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/08\/2024110807520149584.jpg\" class=\"aligncenter\" title=\"js\u5982\u4f55\u538b\u7f29\u56fe\u7247\u63d2\u56fe\" alt=\"js\u5982\u4f55\u538b\u7f29\u56fe\u7247\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528 JavaScript \u538b\u7f29\u56fe\u7247<\/strong><\/p>\n<p>\u5728\u7f51\u7ad9\u548c\u4e2d\u4f18\u5316\u56fe\u50cf\u4ee5\u63d0\u9ad8\u52a0\u8f7d\u901f\u5ea6\u81f3\u5173\u91cd\u8981\u3002JavaScript \u63d0\u4f9b\u4e86\u4e00\u79cd\u4fbf\u6377\u7684\u65b9\u5f0f\u6765\u538b\u7f29\u56fe\u50cf\uff0c\u4ece\u800c\u51cf\u5c11\u6587\u4ef6\u5927\u5c0f\u800c\u4e0d\u5f71\u54cd\u56fe\u50cf\u8d28\u91cf\u3002<\/p>\n<p><strong>\u65b9\u6cd5\uff1a<\/strong><\/p>\n<p><strong>1. \u4f7f\u7528 canvas \u5143\u7d20\uff1a<\/strong><\/p>\n<p><span>\u70b9\u51fb\u4e0b\u8f7d<\/span>\u201c\u201d\uff1b<\/p>\n<ul>\n<li>\u521b\u5efa\u4e00\u4e2a canvas \u5143\u7d20\u5e76\u8bbe\u7f6e\u5176\u5bbd\u5ea6\u548c\u9ad8\u5ea6\u4e0e\u56fe\u50cf\u76f8\u540c\u3002<\/li>\n<li>\u4f7f\u7528 drawImage() \u65b9\u6cd5\u5c06\u56fe\u50cf\u7ed8\u5236\u5230\u753b\u5e03\u4e0a\u3002<\/li>\n<li>\u4f7f\u7528 toDataURL() \u65b9\u6cd5\u83b7\u53d6\u7f29\u5c0f\u7684\u56fe\u50cf\u6570\u636e\u3002<\/li>\n<\/ul>\n<p><strong>2. \u5229\u7528\u7b2c\u4e09\u65b9\u5e93\uff1a<\/strong><\/p>\n<ul>\n<li> <strong>Image Compressor:<\/strong> \u4e00\u4e2a\u53ef\u5728\u6d4f\u89c8\u5668\u548c Node.js \u4e2d\u4f7f\u7528\u7684\u5e93\uff0c\u63d0\u4f9b\u4e00\u7cfb\u5217\u538b\u7f29\u7b97\u6cd5\u3002<\/li>\n<li> <strong>TinyPNG:<\/strong> \u4e00\u4e2a\u4e91\u670d\u52a1\uff0c\u63d0\u4f9b\u514d\u8d39\u548c\u4ed8\u8d39\u7684\u56fe\u50cf\u538b\u7f29\u9009\u9879\u3002<\/li>\n<li> <strong>Jpegmini:<\/strong> \u4e13\u95e8\u9488\u5bf9 JPEG \u56fe\u50cf\u7684\u5e93\uff0c\u53ef\u5b9e\u73b0\u65e0\u635f\u6216\u6709\u635f\u538b\u7f29\u3002<\/li>\n<\/ul>\n<p><strong>\u6b65\u9aa4\uff1a<\/strong><\/p>\n<ol>\n<li> <strong>\u52a0\u8f7d\u56fe\u50cf\uff1a<\/strong>\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u52a0\u8f7d\u9700\u8981\u538b\u7f29\u7684\u56fe\u50cf\uff1a<\/li>\n<\/ol>\n<pre>const image = new Image();\nimage.src = 'image.png';<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<ol>\n<li> <strong>\u538b\u7f29\u56fe\u50cf\uff1a<\/strong>\u4f7f\u7528 canvas \u5143\u7d20\u6216\u7b2c\u4e09\u65b9\u5e93\u538b\u7f29\u56fe\u50cf\u3002<\/li>\n<\/ol>\n<p><strong>\u4f7f\u7528 canvas\uff1a<\/strong><\/p>\n<pre>const canvas = document.createElement('canvas');\ncanvas.width = image.width;\ncanvas.height = image.height;\nconst context = canvas.getContext('2d');\ncontext.drawImage(image, 0, 0);\nconst compressedData = canvas.toDataURL('image\/jpeg', 0.8); \/\/ 0.8 \u4e3a\u8d28\u91cf\u7b49\u7ea7\uff0c\u8303\u56f4 0-1<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 Image Compressor \u5e93\uff1a<\/strong><\/p>\n<pre>import { compress } from 'image-compressor';\nconst compressedData = await compress(image, { quality: 0.8 });<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<ol>\n<li><strong>\u4fdd\u5b58\u538b\u7f29\u540e\u7684\u56fe\u50cf\uff1a<\/strong><\/li>\n<\/ol>\n<ul>\n<li>\u5bf9\u4e8e canvas \u65b9\u6cd5\uff0c\u4f7f\u7528 toDataURL() \u65b9\u6cd5\u83b7\u53d6\u538b\u7f29\u540e\u7684\u56fe\u50cf\u6570\u636e\u3002<\/li>\n<li>\u5bf9\u4e8e\u7b2c\u4e09\u65b9\u5e93\uff0c\u6839\u636e\u5e93\u7684\u6587\u6863\u4fdd\u5b58\u538b\u7f29\u540e\u7684\u56fe\u50cf\u3002<\/li>\n<\/ul>\n<p><strong>\u4f18\u70b9\uff1a<\/strong><\/p>\n<ul>\n<li>\u51cf\u5c11\u56fe\u50cf\u6587\u4ef6\u5927\u5c0f\u3002<\/li>\n<li>\u4f18\u5316\u7f51\u7ad9\u548c\u5e94\u7528\u7a0b\u5e8f\u7684\u52a0\u8f7d\u901f\u5ea6\u3002<\/li>\n<li>\u63d0\u9ad8\u7528\u6237\u4f53\u9a8c\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjs\u5982\u4f55\u538b\u7f29\u56fe\u7247\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":"<p>javascript \u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u538b\u7f29\u56fe\u50cf\u4ee5\u4f18\u5316\u7f51\u7ad9\u548c\u5e94\u7528\u7a0b\u5e8f\u7684\u52a0\u8f7d\u901f\u5ea6\uff1a\u4f7f\u7528 canvas \u5143\u7d20\u5c06\u56fe\u50cf\u7ed8\u5236\u5230\u753b\u5e03\u4e0a\uff0c\u5e76\u901a\u8fc7 todataurl() \u65b9\u6cd5\u83b7\u53d6\u7f29\u5c0f\u7684\u56fe\u50cf\u6570\u636e\u3002\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\uff08\u5982 image compressor\u3001tinypng \u6216 jpegmini\uff09\u538b\u7f29\u56fe\u50cf\u3002\u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u52a0\u8f7d\u56fe\u50cf\u3001\u538b\u7f29\u56fe\u50cf\u5e76\u4fdd\u5b58\u538b\u7f29\u540e\u7684\u56fe\u50cf\uff0c\u4ece\u800c\u51cf\u5c11\u56fe\u50cf\u6587\u4ef6\u5927\u5c0f\uff0c\u4f18\u5316\u52a0\u8f7d\u901f\u5ea6\uff0c\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3002 \u5982\u4f55\u4f7f\u7528 JavaScript \u538b\u7f29\u56fe\u7247 \u5728\u7f51\u7ad9\u548c\u4e2d\u4f18\u5316\u56fe\u50cf\u4ee5\u63d0\u9ad8\u52a0\u8f7d\u901f\u5ea6\u81f3\u5173\u91cd\u8981\u3002JavaScript \u63d0\u4f9b\u4e86\u4e00\u79cd\u4fbf\u6377\u7684\u65b9\u5f0f\u6765\u538b\u7f29\u56fe\u50cf\uff0c\u4ece\u800c\u51cf\u5c11\u6587\u4ef6\u5927\u5c0f\u800c\u4e0d\u5f71\u54cd\u56fe\u50cf\u8d28\u91cf\u3002 \u65b9\u6cd5\uff1a 1. \u4f7f\u7528 canvas \u5143\u7d20\uff1a \u70b9\u51fb\u4e0b\u8f7d\u201c\u201d\uff1b \u521b\u5efa\u4e00\u4e2a canvas \u5143\u7d20\u5e76\u8bbe\u7f6e\u5176\u5bbd\u5ea6\u548c\u9ad8\u5ea6\u4e0e\u56fe\u50cf\u76f8\u540c\u3002 \u4f7f\u7528 drawImage() \u65b9\u6cd5\u5c06\u56fe\u50cf\u7ed8\u5236\u5230\u753b\u5e03\u4e0a\u3002 \u4f7f\u7528 toDataURL() \u65b9\u6cd5\u83b7\u53d6\u7f29\u5c0f\u7684\u56fe\u50cf\u6570\u636e\u3002 2. \u5229\u7528\u7b2c\u4e09\u65b9\u5e93\uff1a Image Compressor: \u4e00\u4e2a\u53ef\u5728\u6d4f\u89c8\u5668\u548c Node.js \u4e2d\u4f7f\u7528\u7684\u5e93\uff0c\u63d0\u4f9b\u4e00\u7cfb\u5217\u538b\u7f29\u7b97\u6cd5\u3002 TinyPNG: \u4e00\u4e2a\u4e91\u670d\u52a1\uff0c\u63d0\u4f9b\u514d\u8d39\u548c\u4ed8\u8d39\u7684\u56fe\u50cf\u538b\u7f29\u9009\u9879\u3002 Jpegmini: \u4e13\u95e8\u9488\u5bf9 JPEG \u56fe\u50cf\u7684\u5e93\uff0c\u53ef\u5b9e\u73b0\u65e0\u635f\u6216\u6709\u635f\u538b\u7f29\u3002 \u6b65\u9aa4\uff1a \u52a0\u8f7d\u56fe\u50cf\uff1a\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u52a0\u8f7d\u9700\u8981\u538b\u7f29\u7684\u56fe\u50cf\uff1a const image = new Image(); image.src = &#8216;image.png&#8217;; \u767b\u5f55\u540e\u590d\u5236 \u538b\u7f29\u56fe\u50cf\uff1a\u4f7f\u7528 [&hellip;]<\/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-3228","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3228","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=3228"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3228\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=3228"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=3228"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=3228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}