$("button"), by class: $(".btn"), and by id $("#target1").
Although it is possible to add multiple classes in a single .addClass() call, let's add them to the same element in three separate ways.
Using .addClass(), add only one class at a time to the same element, three different ways:
Add the animated class to all elements with type button.
Add the shake class to all the buttons with class .btn.
Add the btn-primary class to the button with id #target1.
Noteshake, animated, and btn-primary to #target1.
$("button") selector.'
testString: 'assert(code.match(/\$\s*?\(\s*?(?:"|")\s*?button\s*?(?:"|")/gi), "Use the $("button") selector.");'
- text: 'Use the $(".btn") selector.'
testString: 'assert(code.match(/\$\s*?\(\s*?(?:"|")\s*?\.btn\s*?(?:"|")/gi), "Use the $(".btn") selector.");'
- text: 'Use the $("#target1") selector.'
testString: 'assert(code.match(/\$\s*?\(\s*?(?:"|")\s*?#target1\s*?(?:"|")/gi), "Use the $("#target1") selector.");'
- text: Only add one class with each of your three selectors.
testString: 'assert(code.match(/addClass/g) && code.match(/addClass\s*?\(\s*?("|")\s*?[\w-]+\s*?\1\s*?\)/g).length > 2, "Only add one class with each of your three selectors.");'
- text: 'Your #target1 element should have the classes animated shake and btn-primary.'
testString: 'assert($("#target1").hasClass("animated") && $("#target1").hasClass("shake") && $("#target1").hasClass("btn-primary"), "Your #target1 element should have the classes animated shake and btn-primary.");'
- text: Only use jQuery to add these classes to the element.
testString: 'assert(!code.match(/class.*animated/g), "Only use jQuery to add these classes to the element.");'
```