In many projects, we often need to use JS. When modifying certain elements of the front desk in front of the page, the replace() method of js is essential.
Students who often use "ABCABCabc".replace("A","B") should be more clear. The final result of changing the statement is BBCABC, and this method can only be replaced.
The first matching element. What if you replace all? Just use regular expressions:
"ABCABCabc".replace(/A/g,"B") is enough.
So what if you want to replace A and also replace a?
Then you can use "ABCABCabc".replace(/a/ig,"B");
Flag: i-identification ignores size, g-identification global searches repeatedly, m-identification multiple lines searches (this is not tested for the time being)
A combination of them can also be used, such as the ig used above, which replaces all the ig flags and ignores upper and lower case.
Regular regular writing:
var reg=new RegExp(/patten/flag)
var strs="".match(reg);
When flag uses g, strs returns a string array.
If you want any of the multiple strings to match, you can use
reg=new RegExp(/abc|xyz/ig);