How to use v-on:click.prevent to prevent default behavior in Vue

Vue is a popular JavaScript framework for building dynamic web applications. Its command set provides developers with an easy and efficient way to write JavaScript code alongside HTML.

The v-on directive is used to bind DOM events, such as click, mouseover, keydown and other events. In Vue, sometimes we need to prevent the default behavior of DOM elements, such as not jumping to the page after clicking a link, or preventing form submission.

In order to prevent the default behavior, Vue has built-in modifier .prevent of the v-on directive.

When using the v-on instruction, we can directly use "." to add the modifier after the event name, for example:

<button v-on:click.prevent="handleClick">不跳转</button>

As shown in the above code snippet, we are clicking on the event The .prevent modifier is used later, which will call the preventDefault() method of the event object in the event handler function to prevent the default behavior.

In fact, the .prevent modifier simply adds a line of code to prevent the default behavior of event propagation:

event.preventDefault(); // 阻止默认行为

In addition to the .prevent modifier, Vue also provides other commonly used modifications symbols, such as .stop, .capture, .self, etc. We can use multiple modifiers in combination to implement more complex event processing logic.

In addition, we can also use ES6 arrow functions to define event processing functions, for example:

<button v-on:click.prevent="() => handleClick()">不跳转</button>

As shown in the above code snippet, we use ES6 arrow functions to define event processing functions, which will Bind this pointer as expected and still apply the .prevent modifier.

To sum up, through the .v-on directive and its modifiers in Vue, we can easily implement the default behavior of blocking DOM elements. This is a very convenient feature of the Vue framework, making us more flexible and efficient when writing web applications.

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