javascript实现限定高度下文字随不同设备自适应改变字体大小至字数完全展示

function fontAutoMoreLine() {
    let textBox = document.getElementById("iconTxt");
    let maxHeight = textBox.offsetHeight;
    let title = document.getElementById("iconTitle");
    let size = 5;
    title.style.fontSize = size + 'vw';
    let scrollHeight=title. scrollHeight;
    while (title.scrollHeight > maxHeight) {
        scrollHeight=title. scrollHeight;
        //当容器高度大于最大高度的时候，上一个尝试的值就是最佳大小。
        size = size - 0.2;
        title.style.fontSize = size + 'vw';
        if(scrollHeight<=title.scrollHeight){
            $("#iconTitle").addClass("lineClamp");
            break;
        }
    }
}
fontAutoMoreLine();

<div class="iconTxt" id="iconTxt">
          <div class="iconTitle" id="iconTitle">
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          </div>
</div>

.iconTitle{font-weight:700;font-size:6vw;line-height: 8vw;}
.iconTxt{height:16vw;overflow: hidden;}

.lineClamp {
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    -webkit-line-clamp: 2;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    white-space: normal;
}