As I was working on developing dojo application modules, I came across a regular expression in tutorials.
var pathRegex = new RegExp(/\/[^\/]+$/);
var locationPath = location.pathname.replace(pathRegex, '');
var dojoConfig = {
async: true,
packages: [
{
name: 'modules',
location: locationPath + '/js/modules'
}
};
I am curious about the meaning of this regular expression and how it is being used to replace paths. RegExp(/\/[^\/]+$/)
When using regular expressions to replace text, matching everything between the last / and the end allows you to remove that portion entirely by replacing it with "nothing".
/my/path/goes/here -> /my/path/goes[/here] -> /my/path/goes
An Explanation of the Regular Expression
The outer / can be disregarded as it simply signifies a regular expression (with potential flags following).
To match the character /, it must be escaped as a special character, resulting in \/.
The use of [^...] indicates anything except for what is inside the square brackets.
Therefore, [^\/]+ matches any characters other than / multiple times until reaching the end: $
It's highly recommended to familiarize yourself with the fundamentals of regex, as this knowledge will prove beneficial in the long run! Applying your understanding of regex feels incredibly rewarding, so keep learning and improving! Cheers!
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