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                                            cyndra0

阿里算法题：编写一个函数计算多个数组的交集

``` javascript const intersection = (arrs) => { /** @returns { Set } intersection 两个集合的交集*/ const intersectTwoSets = (set1, set2) => { const result = new Set(set1) for (let item...

Maximum call stack size exceeded;

``` javascript // 边距检测 if (this.data.cut_top > this.data.info.windowHeight - this.data.height) { this.setData({ cut_top: this.data.info.windowHeight - this.data.height }); } ``` 问题就出在浮点数精度上，如果把 cut_Top（left）和 windowHeight （width）打印出来会看到是这样的情况： `43.489 43.488999999999976`，因而导致 touchmove ==> setData...

建议before和after支持一下。

We can get the layout infomation of pseudo elements via `window.getComputedStyle`, and it's widely supported by browsers (https://caniuse.com/?search=getComputedStyle%3A%20Pseudo-element%20support).