mounted() {
let w = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth;
let h = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;
this.$refs.subject.style.height = h + 'px';
this.$refs.rightAnswer.style.height = h + 'px';
this.$refs.sc.style.height = h + 'px';
}
vue里用let 相当于var
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