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{"version":3,"file":"lazyload.bundle.js","sources":["../src/lazyload.js"],"sourcesContent":["/*\n Image Lazy Load Vue3 directive\n \n @package bitrix\n * @subpackage ui\n * @copyright 2001-2021 Bitrix\n /\n\n/\n\tAttention: intersection observer work with errors if image has border-radius\n\n\tExample of usage:\n\n\t<img v-lazyload\n\t\tclass=\"bx-module-element\"\n\t\tsrc=\"https://.../placeholder.png\"\n\t\tdata-lazyload-src=\"https://.../targetImage.png\"\n\t\tdata-lazyload-error-src=\"https://.../errorImage.png\"\n\t/>\n\n\t<img v-lazyload\n\t\tclass=\"bx-module-element\"\n\t\tsrc=\"https://.../placeholder.png\"\n\t\tdata-lazyload-dont-hide\n\t\tdata-lazyload-src=\"https://.../targetImage.png\"\n\t\tdata-lazyload-error-src=\"https://.../errorImage.png\"\n\t/>\n\n\t<img v-lazyload\n\t\tclass=\"bx-module-element\"\n\t\tdata-lazyload-src=\"https://.../targetImage.png\"\n\t/>\n\n\t<img v-lazyload\n\t\tclass=\"bx-module-element\"\n\t\tdata-lazyload-src=\"https://.../targetImage.png\"\n\t\tdata-lazyload-error-class=\"bx-module-element-error\"\n\t\tdata-lazyload-success-class=\"bx-module-element-success\"\n\t/>\n */\n\nimport {BitrixVue} from \"ui.vue3\";\nimport 'main.polyfill.intersectionobserver';\n\nconst WATCH = 'bx-lazyload-watch';\nconst LOADING = 'bx-lazyload-loading';\nconst SUCCESS = 'bx-lazyload-success';\nconst ERROR = 'bx-lazyload-error';\nconst HIDDEN = 'bx-lazyload-hidden';\n\nconst BLANK_IMAGE = \"data:image/svg+xml,%3Csvg width='1px' height='1px' xmlns='http://www.w3.org/2000/svg'%3E%3C/svg%3E\";\n\nexport const lazyload = {\n\tbeforeMount(element, bindings)\n\t{\n\t\tif (typeof bindings.value === 'object' && typeof bindings.value.callback === 'function')\n\t\t{\n\t\t\telement.lazyloadCallback = bindings.value.callback;\n\t\t}\n\n\t\tif (!element.src \|\| element.src === location.href.replace(location.hash, ''))\n\t\t{\n\t\t\telement.src = BLANK_IMAGE;\n\t\t}\n\n\t\tif (lazyloadObserver)\n\t\t{\n\t\t\tlazyloadObserver.observe(element);\n\t\t}\n\t\telse\n\t\t{\n\t\t\tlazyloadLoadImage(element);\n\t\t}\n\t},\n\tupdated(element)\n\t{\n\t\tif (\n\t\t\t!element.classList.contains(SUCCESS)\n\t\t\t&& !element.classList.contains(ERROR)\n\t\t\t&& !element.classList.contains(WATCH)\n\t\t\t&& !element.classList.contains(LOADING)\n\t\t)\n\t\t{\n\t\t\telement.classList.add(LOADING);\n\t\t}\n\t\telse if (\n\t\t\t(element.classList.contains(SUCCESS) \|\| element.classList.contains(ERROR))\n\t\t\t&& element.dataset.lazyloadSrc\n\t\t\t&& element.dataset.lazyloadSrc !== element.src\n\t\t)\n\t\t{\n\t\t\tif (!element.dataset.lazyloadSrc.startsWith('http'))\n\t\t\t{\n\t\t\t\tconst url = document.createElement('a');\n\t\t\t\turl.href = element.dataset.lazyloadSrc;\n\t\t\t\tif (url.href === element.src)\n\t\t\t\t{\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t}\n\t\t\tlazyloadLoadImage(element);\n\t\t}\n\t},\n\tunmounted(element)\n\t{\n\t\tif (lazyloadObserver)\n\t\t{\n\t\t\tlazyloadObserver.unobserve(element);\n\t\t}\n\t}\n};\n\nlet lazyloadObserver = null;\nlet lazyloadLoadImage = function(currentImage, callback)\n{\n\tlet SUCCESS_CLASS = currentImage.dataset.lazyloadSuccessClass? currentImage.dataset.lazyloadSuccessClass.split(\" \"): [];\n\tdelete currentImage.dataset.lazyloadSuccessClass;\n\n\tSUCCESS_CLASS = [SUCCESS, ...SUCCESS_CLASS];\n\n\tlet ERROR_CLASS = currentImage.dataset.lazyloadErrorClass? currentImage.dataset.lazyloadErrorClass.split(\" \"): [];\n\tdelete currentImage.dataset.lazyloadErrorClass;\n\n\tERROR_CLASS = [ERROR, ...ERROR_CLASS];\n\n\tcurrentImage.classList.add(LOADING);\n\n\tconst newImage = new Image();\n\tnewImage.src = currentImage.dataset.lazyloadSrc;\n\n\tif (!currentImage.dataset.lazyloadHiddenSrc)\n\t{\n\t\tcurrentImage.dataset.lazyloadHiddenSrc = currentImage.src;\n\t}\n\n\tnewImage.onload = function()\n\t{\n\t\tif (currentImage.classList.contains(HIDDEN))\n\t\t{\n\t\t\treturn false;\n\t\t}\n\n\t\tif (currentImage.dataset.lazyloadSrc)\n\t\t{\n\t\t\tcurrentImage.src = currentImage.dataset.lazyloadSrc;\n\t\t}\n\n\t\tcurrentImage.classList.remove(LOADING);\n\t\tcurrentImage.classList.add(...SUCCESS_CLASS);\n\n\t\tif (typeof currentImage.lazyloadCallback === 'function')\n\t\t{\n\t\t\tcurrentImage.lazyloadCallback({element: currentImage, state: 'success'});\n\t\t\tdelete currentImage.lazyloadCallback;\n\t\t}\n\t};\n\n\tnewImage.onerror = function()\n\t{\n\t\tif (currentImage.classList.contains(HIDDEN))\n\t\t{\n\t\t\treturn false;\n\t\t}\n\n\t\tcurrentImage.classList.remove(LOADING);\n\t\tcurrentImage.classList.add(...ERROR_CLASS);\n\t\tcurrentImage.title = '';\n\t\tcurrentImage.alt = '';\n\n\t\tif (typeof currentImage.lazyloadCallback === 'function')\n\t\t{\n\t\t\tcurrentImage.lazyloadCallback({element: currentImage, state: 'error'});\n\t\t\tdelete currentImage.lazyloadCallback;\n\t\t}\n\t\telse\n\t\t{\n\t\t\tcurrentImage.src = BLANK_IMAGE;\n\t\t}\n\t};\n\n\tif 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