Hướng dẫn replace space in javascript
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This is for all of the dummies like me who test the scripts written by some of you guys which do not work. The following 3 examples are the steps I took to remove special characters AND extra spaces on the following 3 websites (all of which work perfectly) {1. EtaVisa.com 2. EtaStatus.com 3. Tikun.com} so I know that these work perfectly. We have chained these together with over 50 at a time and NO problems. // This removed special characters + 0-9 and allows for just letters (upper and LOWER case)
// This removed special characters and allows for just letters (upper and LOWER case) and 0-9 AND spaces
// This removed special characters and allows for just letters (upper and LOWER case) and 0-9 AND spaces // The .replace(/\s\s+/g, " ") at the end removes excessive spaces // when I used single quotes, it did not work.
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Save #3 as ::NEXT:: Include your JS into your page
Include this in your form field:: such as
So that it looks like this
This will remove special characters, allow for single spaces and remove extra spaces. Find out how to use a regex to replace all white space inside a string using JavaScriptReplacing all the white space inside a string is a very common need. For example I last used this inside an API endpoint that received an image. I used the original image name to store it, but if it contained a space it was breaking my functionality (or other special chars, but let’s focus on spaces) So I researched the best way to do what I wanted. Turns out, a regular expression was what I needed! Here it is, in full
The Remember that the ExamplesReplace Microsoft: Nội dung chính
let text = "Visit Microsoft!"; Try it Yourself » A global replacement: let text = "Mr Blue has a blue house and a blue car"; Try it Yourself » More examples below. Definition and UsageThe The The NoteIf you replace a value, only the first instance will be replaced. To replace all instances, use a regular expression with the g modifier set. Read more about regular expressions in our:
Syntaxstring.replace(searchValue, newValue) Parameters
Return Value
More ExamplesA global, case-insensitive replacement: let text = "Mr Blue has a blue house and a blue car"; Try it Yourself » A function to return the replacement text: let text = "Mr Blue has a blue house and a blue car"; Try it Yourself » Browser Support
ES1 (JavaScript 1997) is fully supported in all browsers:
Summary: in this tutorial, you’ll how to use JavaScript String Introduction to the JavaScript String replace() methodThe following shows the syntax of the
The JavaScript String Note that the The following example uses the
Output:
As you can see from the output, only the first occurrence of the substring To replace all occurrences of a substring in a string with a new one, you must use a regular expression. Using regular expressionsThe
In this syntax, the The following example uses the global flag (
Output:
If you want to ignore cases for
searching and replacement, you can use the ignore flag (
Output:
Using a replacement functionInstead of passing a
In this syntax, the If you use the global flag ( The
The following are the meaning of each parameter:
The following example uses the
Output:
Summary
Was this tutorial helpful ? What does replace method do?The replace() method searches a string for a specified character, and returns a new string where the specified character(s) are replaced. What is $1 in replace JavaScript?In your specific example, the $1 will be the group (^| ) which is "position of the start of string (zero-width), or a single space character". So by replacing the whole expression with that, you're basically removing the variable theClass and potentially a space after it. What is difference between replace and replaceAll in JavaScript?3.1 The difference between replaceAll() and replace() If search argument is a string, replaceAll() replaces all occurrences of search with replaceWith , while replace() only the first occurence. If search argument is a non-global regular expression, then replaceAll() throws a TypeError exception. What is replace (/ g in JavaScript?The "g" that you are talking about at the end of your regular expression is called a "modifier". The "g" represents the "global modifier". This means that your replace will replace all copies of the matched string with the replacement string you provide. |