javascript - 如何仅在文本区域的开头删除空格和换行符

Question

我只想在开头删除空格和换行符。我需要一些建议，我正在使用以下代码。

var myTxtArea = document.getElementById('visionText');
myTxtArea.value = myTxtArea.value.replace(/^s|^n/g, '');

Answer 1

alert(" \n\n    I am a string \n  starting with whitespace and newline");
alert(" \n\n    I am a string with no starting whitespace and newline".replace(/^\s+/, ""));

var reg = /^\s|\n/g;

var str = " asdfkadsf[xxxxx]bb";

var test = str.replace(reg,"") ;

也试试这个

" \n\n    I am a string  ".replace(/^\s+/,"");