JavaScript .replace 仅替换第一个匹配项
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JavaScript .replace only replaces first Match
提问by Yardstermister
var textTitle = "this is a test"
var result = textTitle.replace(' ', '%20');
But the replace functions stops at the first instance of the " " and I get the
但是替换函数在“”的第一个实例处停止，我得到
Result : "this%20is a test"
结果 ： "this%20is a test"
Any ideas on where Im going wrong im sure its a simple fix.
关于我哪里出错的任何想法，我确定这是一个简单的修复。
回答by Nick Craver
You need a /gon there, like this:
你需要/g在那里，像这样：
var textTitle = "this is a test";
var result = textTitle.replace(/ /g, '%20');
console.log(result);You can play with it here, the default .replace()behavior is to replace only the first match, the /gmodifier(global) tells it to replace all occurrences.
回答by Nikita Rybak
textTitle.replace(/ /g, '%20');
回答by J. Holmes
Try using a regex instead of a string for the first argument.
尝试对第一个参数使用正则表达式而不是字符串。
"this is a test".replace(/ /g,'%20')// #=> "this%20is%20a%20test"
"this is a test".replace(/ /g,'%20')// #=> "this%20is%20a%20test"
回答by Subham Debnath
For that you neet to use the g flag of regex.... Like this :
为此，您需要使用正则表达式的 g 标志.... 像这样：
var new_string=old_string.replace( / (regex) /g, replacement_text);
That sh
那个sh
回答by Jhonny D. Cano -Leftware-
The replace() method searches for a matchbetween a substring (or regular expression) and a string, and replaces the matched substring with a new substring
用于替换（）方法检索一个匹配的子串（或正则表达式）和一个串之间，并替换匹配用新的子串
Would be better to use a regex here then:
那么在这里使用正则表达式会更好：
textTitle.replace(/ /g, '%20');
回答by Nigrimmist
The same, if you need "generic" regex from string :
同样，如果您需要来自 string 的“通用”正则表达式：
const textTitle = "this is a test";
const regEx = new RegExp(' ', "g");
const result = textTitle.replace(regEx , '%20');
console.log(result); // "this%20is%20a%20test" will be a result
回答by amfeng
Try using replaceWith()or replaceAll()
尝试使用replaceWith()或replaceAll()
