Javascript 在文本框中输入值时修剪空格
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Javascript to Trim spaces when enter value in text box
提问by Asif
I am currently trying to show one text box value in another using javascript function
我目前正在尝试使用 javascript 函数在另一个文本框中显示一个值
function fillTextbox() {
var txtCompanyName = document.getElementById("txtCompanyName").value;
document.getElementById("txtSecureSite").value = txtCompanyName;
}
and i successfully done this but now i want to trim spaces when my user enters a name with spaces. Please help as i am new in javascript.
我成功地做到了这一点，但现在我想在我的用户输入带空格的名称时修剪空格。请帮忙，因为我是 javascript 新手。
回答by Habib
Use string.trim()
document.getElementById("txtSecureSite").value = txtCompanyName.toString().trim();
From MDN
来自MDN
Running the following code before any other code will create String.trim if it's not natively available.
如果 String.trim 本机不可用，则在任何其他代码之前运行以下代码将创建 String.trim。
if(!String.prototype.trim) {
String.prototype.trim = function () {
return this.replace(/^\s+|\s+$/g,'');
};
}
回答by Asif
You can trim any string value like this:
您可以像这样修剪任何字符串值：
" string ".trim(); // outputs: "string"
Based on: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/String/Trim
基于：https: //developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/String/Trim
Or use jQuery.trim()instead:
或者jQuery.trim()改用：
$.trim(" string "); // outputs: "string"
回答by Talha
回答by Pir Abdul
Use replace(/(^\s+|\s+$)/g, '')to remove spaces from the begining and end of the string.
使用replace(/(^\s+|\s+$)/g, '')删除从字符串的开头和结尾空间。
function fillTextbox() {
var txtCompanyName = document.getElementById("txtCompanyName").value;
var company = txtCompanyName.replace(/(^\s+|\s+$)/g, '');
document.getElementById("txtSecureSite").value = company;
}
回答by Shree
Try :
尝试 ：
function fillTextbox() {
var txtCompanyName = document.getElementById("txtCompanyName").value;
var company = txtCompanyName.replace(/\s/g, "");
document.getElementById("txtSecureSite").value = company;
}
