{"id":25273,"date":"2024-03-16T04:39:43","date_gmt":"2024-03-16T04:39:43","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/"},"modified":"2024-03-22T05:46:30","modified_gmt":"2024-03-22T05:46:30","slug":"how-to-achieve-image-lazy-loading-in-uniapp","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/","title":{"rendered":"How to achieve image lazy loading in UniApp?"},"content":{"rendered":"<p>To achieve image lazy loading, you can use the IntersectionObserver component provided by uniapp. Here are the steps to implement image lazy loading:<\/p>\n<ol>\n<li>Create an IntersectionObserver object in Uniapp to observe if an image enters the visible area.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-comment\">\/\/ \u5728\u9875\u9762\u7684onLoad\u94a9\u5b50\u51fd\u6570\u4e2d\u521b\u5efaIntersectionObserver\u5bf9\u8c61<\/span>\r\n<span class=\"hljs-title function_\">onLoad<\/span>(<span class=\"hljs-params\"><\/span>) {\r\n  <span class=\"hljs-variable language_\">this<\/span>.<span class=\"hljs-property\">observer<\/span> = uni.<span class=\"hljs-title function_\">createIntersectionObserver<\/span>(<span class=\"hljs-variable language_\">this<\/span>)\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>Bind an IntersectionObserver object to the image tag on the page, and set the initial src of the image to a placeholder.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">template<\/span>&gt;<\/span>\r\n  <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">img<\/span> <span class=\"hljs-attr\">:src<\/span>=<span class=\"hljs-string\">\"placeholder\"<\/span> <span class=\"hljs-attr\">:data-src<\/span>=<span class=\"hljs-string\">\"imageUrl\"<\/span> @<span class=\"hljs-attr\">load<\/span>=<span class=\"hljs-string\">\"onImgLoad\"<\/span> <span class=\"hljs-attr\">class<\/span>=<span class=\"hljs-string\">\"lazy-img\"<\/span>&gt;<\/span>\r\n<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">template<\/span>&gt;<\/span>\r\n<\/code><\/pre>\n<ol>\n<li>Listen to the IntersectionObserver object&#8217;s callback function, when the image enters the visible area, assign the value of the data-src attribute to the src attribute, achieving lazy loading of the image.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-comment\">\/\/ \u5728\u9875\u9762\u7684onReady\u94a9\u5b50\u51fd\u6570\u4e2d\u5f00\u59cb\u89c2\u5bdf\u56fe\u7247<\/span>\r\n<span class=\"hljs-title function_\">onReady<\/span>(<span class=\"hljs-params\"><\/span>) {\r\n  <span class=\"hljs-variable language_\">this<\/span>.<span class=\"hljs-property\">observer<\/span>\r\n    .<span class=\"hljs-title function_\">relativeToViewport<\/span>()\r\n    .<span class=\"hljs-title function_\">observe<\/span>(<span class=\"hljs-string\">'.lazy-img'<\/span>, <span class=\"hljs-function\">(<span class=\"hljs-params\">res<\/span>) =&gt;<\/span> {\r\n      <span class=\"hljs-keyword\">if<\/span> (res.<span class=\"hljs-property\">intersectionRatio<\/span> &gt; <span class=\"hljs-number\">0<\/span>) {\r\n        <span class=\"hljs-keyword\">const<\/span> { dataset } = res.<span class=\"hljs-property\">target<\/span>\r\n        res.<span class=\"hljs-property\">target<\/span>.<span class=\"hljs-property\">src<\/span> = dataset.<span class=\"hljs-property\">src<\/span>\r\n        <span class=\"hljs-variable language_\">this<\/span>.<span class=\"hljs-property\">observer<\/span>.<span class=\"hljs-title function_\">disconnect<\/span>()\r\n      }\r\n    })\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>Assign the src attribute of the image to the actual image link when the image finishes loading.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-attr\">methods<\/span>: {\r\n  <span class=\"hljs-title function_\">onImgLoad<\/span>(<span class=\"hljs-params\">event<\/span>) {\r\n    <span class=\"hljs-keyword\">const<\/span> { dataset } = event.<span class=\"hljs-property\">target<\/span>\r\n    event.<span class=\"hljs-property\">target<\/span>.<span class=\"hljs-property\">src<\/span> = dataset.<span class=\"hljs-property\">src<\/span>\r\n  }\r\n}\r\n<\/code><\/pre>\n<p>In this way, when the image enters the visible area, the src attribute of the image will be replaced with the actual image link, achieving lazy loading of images.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To achieve image lazy loading, you can use the IntersectionObserver component provided by uniapp. Here are the steps to implement image lazy loading: Create an IntersectionObserver object in Uniapp to observe if an image enters the visible area. \/\/ \u5728\u9875\u9762\u7684onLoad\u94a9\u5b50\u51fd\u6570\u4e2d\u521b\u5efaIntersectionObserver\u5bf9\u8c61 onLoad() { this.observer = uni.createIntersectionObserver(this) } Bind an IntersectionObserver object to the image tag on [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-25273","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to achieve image lazy loading in UniApp? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to achieve image lazy loading in UniApp?\" \/>\n<meta property=\"og:description\" content=\"To achieve image lazy loading, you can use the IntersectionObserver component provided by uniapp. Here are the steps to implement image lazy loading: Create an IntersectionObserver object in Uniapp to observe if an image enters the visible area. \/\/ \u5728\u9875\u9762\u7684onLoad\u94a9\u5b50\u51fd\u6570\u4e2d\u521b\u5efaIntersectionObserver\u5bf9\u8c61 onLoad() { this.observer = uni.createIntersectionObserver(this) } Bind an IntersectionObserver object to the image tag on [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-16T04:39:43+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-22T05:46:30+00:00\" \/>\n<meta name=\"author\" content=\"Olivia Parker\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Olivia Parker\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/\"},\"author\":{\"name\":\"Olivia Parker\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/3ff7b3da0e45ac5dbbef2502f3cea8d9\"},\"headline\":\"How to achieve image lazy loading in UniApp?\",\"datePublished\":\"2024-03-16T04:39:43+00:00\",\"dateModified\":\"2024-03-22T05:46:30+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/\"},\"wordCount\":146,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/\",\"name\":\"How to achieve image lazy loading in UniApp? - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\"},\"datePublished\":\"2024-03-16T04:39:43+00:00\",\"dateModified\":\"2024-03-22T05:46:30+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.silicloud.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"How to achieve image lazy loading in UniApp?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"name\":\"Silicon Cloud Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\",\"name\":\"Silicon Cloud Blog\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"contentUrl\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"width\":1024,\"height\":1024,\"caption\":\"Silicon Cloud Blog\"},\"image\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\",\"https:\/\/twitter.com\/SiliCloudGlobal\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/3ff7b3da0e45ac5dbbef2502f3cea8d9\",\"name\":\"Olivia Parker\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/56c66f189ba32a6f9eb50f31a38fe774e2a725c213d4070835ccc51b8fbbc54b?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/56c66f189ba32a6f9eb50f31a38fe774e2a725c213d4070835ccc51b8fbbc54b?s=96&d=mm&r=g\",\"caption\":\"Olivia Parker\"},\"url\":\"https:\/\/www.silicloud.com\/blog\/author\/oliviaparker\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"How to achieve image lazy loading in UniApp? - Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/","og_locale":"en_US","og_type":"article","og_title":"How to achieve image lazy loading in UniApp?","og_description":"To achieve image lazy loading, you can use the IntersectionObserver component provided by uniapp. Here are the steps to implement image lazy loading: Create an IntersectionObserver object in Uniapp to observe if an image enters the visible area. \/\/ \u5728\u9875\u9762\u7684onLoad\u94a9\u5b50\u51fd\u6570\u4e2d\u521b\u5efaIntersectionObserver\u5bf9\u8c61 onLoad() { this.observer = uni.createIntersectionObserver(this) } Bind an IntersectionObserver object to the image tag on [&hellip;]","og_url":"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/","og_site_name":"Blog - Silicon Cloud","article_publisher":"https:\/\/www.facebook.com\/SiliCloudGlobal\/","article_published_time":"2024-03-16T04:39:43+00:00","article_modified_time":"2024-03-22T05:46:30+00:00","author":"Olivia Parker","twitter_card":"summary_large_image","twitter_creator":"@SiliCloudGlobal","twitter_site":"@SiliCloudGlobal","twitter_misc":{"Written by":"Olivia Parker","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/#article","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/"},"author":{"name":"Olivia Parker","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/3ff7b3da0e45ac5dbbef2502f3cea8d9"},"headline":"How to achieve image lazy loading in UniApp?","datePublished":"2024-03-16T04:39:43+00:00","dateModified":"2024-03-22T05:46:30+00:00","mainEntityOfPage":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/"},"wordCount":146,"commentCount":0,"publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/","url":"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/","name":"How to achieve image lazy loading in UniApp? - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/#website"},"datePublished":"2024-03-16T04:39:43+00:00","dateModified":"2024-03-22T05:46:30+00:00","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/blog\/how-to-achieve-image-lazy-loading-in-uniapp\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.silicloud.com\/blog\/"},{"@type":"ListItem","position":2,"name":"How to achieve image lazy loading in UniApp?"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/blog\/#website","url":"https:\/\/www.silicloud.com\/blog\/","name":"Silicon Cloud Blog","description":"","publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.silicloud.com\/blog\/#organization","name":"Silicon Cloud Blog","url":"https:\/\/www.silicloud.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","contentUrl":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","width":1024,"height":1024,"caption":"Silicon Cloud Blog"},"image":{"@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/SiliCloudGlobal\/","https:\/\/twitter.com\/SiliCloudGlobal"]},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/3ff7b3da0e45ac5dbbef2502f3cea8d9","name":"Olivia Parker","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/56c66f189ba32a6f9eb50f31a38fe774e2a725c213d4070835ccc51b8fbbc54b?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/56c66f189ba32a6f9eb50f31a38fe774e2a725c213d4070835ccc51b8fbbc54b?s=96&d=mm&r=g","caption":"Olivia Parker"},"url":"https:\/\/www.silicloud.com\/blog\/author\/oliviaparker\/"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/25273","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/comments?post=25273"}],"version-history":[{"count":1,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/25273\/revisions"}],"predecessor-version":[{"id":59364,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/25273\/revisions\/59364"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/media?parent=25273"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/categories?post=25273"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/tags?post=25273"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}