Javascript 正则表达式匹配 textarea 中的换行符

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时间:2020-08-24 02:27:25  来源:igfitidea点击:

Regex match newline in textarea

javascriptjqueryregex

提问by OptimusCrime

I have to get the value from a textarea using jQuery and count the number of newlines there. I'd like to do this using a regex-expression. Does anyone know how to do that?

我必须使用 jQuery 从 textarea 获取值并计算那里的换行数。我想使用正则表达式来做到这一点。有谁知道这是怎么做到的吗?

回答by i100

regex does not have count. better use array like this

正则表达式没有计数。更好地使用这样的数组

var val = textarea.value;
var arr = val.split(/[\n\r]/g);
var count = arr.length;

you could condense this in less rows and vars...

您可以将其压缩为更少的行和变量...

var count = $('textarea').val().split(/[\n\r]/g).length;

回答by Carlos Gant

http://jsfiddle.net/qxKmW/1/

http://jsfiddle.net/qxKmW/1/

$(document).ready(function() {
    var str = $("#txtField").val();
    parts = str.split(/[\n\r]/g);
    var newline_count = parts.length;
    alert("Count: " + newline_count);
});