想实现 多行文本溢出显示省略号，在网上看到这样一段代码， 如何在uniapp使用这段JS代码？ 求大神指教
<script type="text/javascript">
const text = '这是一段很长的文本';
const totalTextLen = text.length;
const formatStr = () => {
const ele = document.getElementsByClassName('demo')[0];
const lineNum = 2;
const baseWidth = window.getComputedStyle(ele).width;
const baseFontSize = window.getComputedStyle(ele).fontSize;
const lineWidth = +baseWidth.slice(0, -2);
// 所计算的strNum为元素内部一行可容纳的字数(不区分中英文)
const strNum = Math.floor(lineWidth / +baseFontSize.slice(0, -2));
let content = '';
// 多行可容纳总字数
const totalStrNum = Math.floor(strNum * lineNum);
const lastIndex = totalStrNum - totalTextLen;
if (totalTextLen > totalStrNum) {
content = text.slice(0, lastIndex - 3).concat('...');
} else {
content = text;
}
ele.innerHTML = content;
}
formatStr();
window.onresize = () => {
formatStr();
}; </script>
<body>
<div class='demo'></div>
</body>
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