I'm confused as to why the output is 'now ' instead of just 'now'.
mainQueryString = 'now ';
mainQueryString = mainQueryString.replace('/\s+$/g', ''); /* removing the ending space */
console.log('mainQueryString:', '\''+mainQueryString+'\'');
It still shows 'now ' with whitespace at the end.
What is the benefit of using regex?
You can achieve similar results by utilizing the trim method.
mainQueryString = 'now ';
mainQueryString = mainQueryString.trim();
Make sure to remove the single quotes around the regex pattern to match the pattern correctly in JavaScript:
mainQueryString = mainQueryString.replace(/\s+$/g, '');
console.log('mainQueryString:', '\''+mainQueryString+'\'');// 'now'
Keep in mind that the trim() method may not be supported in older browsers such as IE7 - for more information, visit: Trim string in JavaScript?
Another approach was suggested by someone regarding the use of the trim function as a better solution for this problem. The reason your regex is not functioning as intended is because you enclosed it in single quotes, which converts it into a regular string.
Here are some examples to illustrate:
var foo = 'foo'.replace('/foo/', 'bar'); // Result will be 'foo'
var bar = 'foo'.replace(/foo/, 'bar'); // Result will be 'bar'
//For compatibility with Internet Explorer 9 and newer:
var str= "now " ;
console.log(str.trim()) ;
//To ensure support for Internet Explorer 8 and older versions:
if(typeof String.prototype.trim !== 'function') {
String.prototype.trim = function() {
return this.replace(/^\s+|\s+$/g, '');
}
}
var str= "now " ;
console.log(str.trim()) ;
//Please note: You can also utilize the trim() method from JavaScript libraries such as Jquery.js or dojo.js if they are integrated into your project.
Forget regex, you can skip it entirely! Since older browsers don't support the trim method, try this simple pure JavaScript approach:
var originalText = 'hello ';
originalText = originalText.substring(0, originalText.lastIndexOf(" "));
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