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vue.js does not support ie8 because [Vue.js] uses ECMAScript 5 features that IE8 cannot simulate. [Vue.js] supports all browsers that are compatible with ECMAScript 5.
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Vue.js is not supported IE8 and below, because Vue.js uses ECMAScript 5 features that IE8 cannot emulate. Vue.js supports all ECMAScript 5-compatible browsers.
Let’s first look at why Vue is not compatible with IE8
The root cause: ie8 and below versions do not support the Object.defineProperty method, but this is a responsive implementation of vue It is necessary, so judging from the source code of Vue, it cannot support IE8 at all;
Furthermore, Vue also needs to support Promise support, and IE8 also does not support Promsie;
Look at the Vue official website and see why IE8 is not supported
Vue.js will use Object.defineProperty to convert all these properties into getters/setters for all data that implements two-way binding. Object.defineProperty is a feature in ES5 that cannot be shimmed, which is why Vue does not support IE8 and lower browsers.
Note here: Object.defineProperty is a method that cannot be implemented through the backing board. It is related to the browser itself, so Vue fundamentally cannot support IE8;
Vue IE8 and below are not supported because Vue uses ECMAScript 5 features that IE8 cannot emulate. But it supports all browsers compatible with ECMAScript 5
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