31 lines
839 B
JavaScript
31 lines
839 B
JavaScript
(function () {
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var DEFAULT_VIEWPORT = 'width=device-width,initial-scale=1,maximum-scale=1,minimum-scale=1,user-scalable=no';
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var Viewport = {
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ensureViewportElement: function ensureViewportElement() {
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var viewportElement = document.querySelector('meta[name=viewport]');
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if (!viewportElement) {
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viewportElement = document.createElement('meta');
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viewportElement.name = 'viewport';
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document.head.appendChild(viewportElement);
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}
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return viewportElement;
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},
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setup: function setup() {
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var viewportElement = Viewport.ensureViewportElement();
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if (!viewportElement) {
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return;
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}
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if (!viewportElement.hasAttribute('content')) {
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viewportElement.setAttribute('content', DEFAULT_VIEWPORT);
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}
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}
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};
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window.Viewport = Viewport;
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})(); |