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The hasAttribute method can tell whether the element has the given attribute or not. A true is returned if the element has the attribute, and false otherwise. The attributes collection is iterable and has all the attributes of the element (standard and non-standard) as objects with name and value properties. Property-attribute synchronization. When a standard attribute changes, the corresponding property is auto-updated, and (with some exceptions) vice versa. Se hela listan på sailsjs.com The directive sets the required attribute on the element if the AngularJS expression inside ngRequired evaluates to true. A special directive for setting required is necessary because we cannot use interpolation inside required .
The support of the required attribute and built-in browser validation is one such feature. With the HTML5 required attribute, you can perform form input validation without the complicated JavaScript code. However, the validation with the required attribute doesn’t work sometimes due to the lake of proper markup. This allows us to select only one radio button at once and apply the required attribute to the whole group. Let’s see how this is done. Create HTML¶ Use a