Javascript switch statement if string contains substring
I am trying to figure out how to make a switch statement where I need to find the class name for an object and then do something depending on the class name (in a switch statement).
In this example, I need a switch statement to do whatever I want when the class contains a specific word, such as "person".
Html
<div class="person temp something"></div>
Javascript
$(document).on('mousedown', function(e) {
var clicked = $(e.target).attr('class');
console.log(clicked);
switch (clicked) {
case "person":
//do something
break;
default:
//do something
}
});
The switch operator's name, such as "person", is not guaranteed to appear in the first place.
I know I can search through an array for a specific word, but I don't know how to add that to this.
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As I said in my comment, the instruction switch
does not seem like a suitable approach in this situation.
Since you are using jQuery, just use : .hasClass
if ($(e.target).hasClass('person')) {
// do something
}
If you want to do something a little more complex for multiple classes, you can create a mapping class -> function
and just loop over the list of classes:
var classActions = {
person: function(element) { /* do something */ },
temp: function(element) { /* do something */},
// ...
};
var classes = e.target.className.split(/\s+/);
$.each(classes, function(index, cls) {
classActions[cls](e.target);
});
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You will need a combination of .split () and .indexOf () . Your code will be something like this:
var clicked = $(e.target).attr('class');
var classes = clicked.split(' ');
if(classess.indexOf('person') > 0) {
//do work
} else if (classes.indexOf('foo') > 0) {
//do work
} else if (classes.indexOf('bar') > 0) {
//do work
}
MDN documentation in .split ()
MDN documentation at .indexOf ()
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Note that there are many methods that allow you to do this. For example, you can use string.search(substring)
to check if a string contains your substring. If there is a substring, it returns the found index (some number from 0 to n ), otherwise, if it is not found, it returns -1. Therefore, if search
greater than or equal to 0, there is a substring.
if(clicked.search("person") >= 0)
// "person" is in clicked
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