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4f77a2e5f5
* improve code style * move getRequestAnimationFrame to util * Fix ssr problem in BackTop, close #3343
13 lines
416 B
TypeScript
13 lines
416 B
TypeScript
export default function getRequestAnimationFrame() {
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if (typeof window === 'undefined') {
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return () => {};
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}
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if (window.requestAnimationFrame) {
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return window.requestAnimationFrame;
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}
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const prefix = ['moz', 'ms', 'webkit'].filter(key => `${key}RequestAnimationFrame` in window)[0];
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return prefix
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? window[`${prefix}RequestAnimationFrame`]
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: callback => setTimeout(callback, 1000 / 60);
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}
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