Input文本框随着输入内容多少自动延伸的实现

functioncheckLength(which) {

varoTextCount = document.getElementById("char");

iCount = which.value.replace(/[^/u0000-/u00ff]/g,"aa");

oTextCount.innerHTML =""+ iCount.length+"";

which.style.border ='1px dotted #FF0000';

which.size=iCount.length+2;

}

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