問題描述
讀取 url JQuery 中的 GET 變量 (read the GET variables in url JQuery)
Sorry for another "simple" question, but is there an easy way to read the GET variables from a URL. example. I have a url http://www.domain.com/page.php?var1=1 In my case I will only have 1 variable i.e. var1 or var2 (the variable can change but there will only every be one per url). All the tuts I have seen relate to arrays rather than "singletons" OK I know an array solution may be better but this is just a simple single get variable. Any suggestions? Thanks in advance
參考解法
方法 1:
var split = location.search.replace('?', '').split('=')
split[0] is your var name, and split[1] is your var value. You actually don't really need jQuery for that piece of code ;)
As for twiz's comment, splitting multiple variables can be done like that:
var split = location.search.replace('?', '').split('&').map(function(val){
return val.split('=');
});
You can access variable name by split[index][0] and value by split[index][1].
Of course you can use the second snippet instead of the first one for one variable too.
方法 2:
I use this in my default javascript file.
var get = [];
location.search.replace('?', '').split('&').forEach(function (val) {
split = val.split("=", 2);
get[split[0]] = split[1];
});
Now you can use them by name:
get["var1"]
方法 3:
You can use this function that returns the value of the specified var name from url if the var exists. Otherwise you will get an empty string.
function getUrlValue(varName) {
var split = $(location).attr('href').split('?');
var value = '';
if (split.length == 2) {
split = split[1].split('&');
for (var i = 0; i < split.length; i+=1) {
var keyValue = split[i].split('=');
if (keyValue.length == 2 && keyValue[0] == varName) {
value = keyValue[1];
break;
}
}
}
return value;
}
方法 4:
With ES2019 to create an object:
let GET = Object.fromEntries( location.search .replace( '?', '' ) .split( '&' ) .map( i => i.split( '=' ) ) );
The Object.fromEntries method creates an object from an array.
For the URL http://www.example.com/page?var1=1&var2=2 the above code returns the object
{
var1: '1',
var2: '2'
}
(by Russell Parrott、usoban、Tiele Declercq、ungalcrys、jla)