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edit Promise typo
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@ -487,7 +487,7 @@ p.then(null, function (s){
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我们可以将图片的加载写成一个`Promise`,一旦加载完成,`Promise`的状态就发生变化。
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我们可以将图片的加载写成一个`Promise`,一旦加载完成,`Promise`的状态就发生变化。
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```javascript
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```javascript
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conset preloadImage = function (path) {
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const preloadImage = function (path) {
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return new Promise(function (resolve, reject) {
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return new Promise(function (resolve, reject) {
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var image = new Image();
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var image = new Image();
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image.onload = resolve;
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image.onload = resolve;
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