How to get the content of cssid in vue

With the continuous development of web applications, front-end technology is becoming more and more mature. The Vue framework, in particular, allows developers to create web applications more efficiently. During the development process of Vue, sometimes you need to get the CSS ID of a certain element to perform some operations. This process may be confusing to some developers. This article will introduce how to get the content of CSS ID in Vue.

1. Use $refs to obtain elements

In Vue, you can use $refs to obtain references to components or elements. Each Vue component has its own $refs object, which can be accessed by setting the ref attribute on the element in the template. The following is an example:

<template>
  <div>
    <button ref="myButton" @click="doSomething">Click me</button>
  </div>
</template>

<script>
export default {
  methods: {
    doSomething() {
      const button = this.$refs.myButton;
      console.log(button.id); // 输出元素的ID
    },
  },
};
</script>

In the above code, we can see that the element has a ref attribute value of "myButton", and then we can use this.$refs.myButton to get the A reference to the element, thereby accessing its id attribute.

2. Use the document.getElementById() method

Another way to get the content of the CSS ID is to use the native JavaScript document.getElementById() method. This method finds elements from the entire document and returns the first matching element. The following is an example:

<template>
  <div>
    <button id="myButton" @click="doSomething">Click me</button>
  </div>
</template>

<script>
export default {
  methods: {
    doSomething() {
      const button = document.getElementById('myButton');
      console.log(button.id); // 输出元素的ID
    },
  },
};
</script>

In the above code, we can see that the

element has an id attribute of "myButton", and then we can use document.getElementById('myButton') to get A reference to the element, thereby accessing its id attribute.

3. Use the $el attribute in Vue

In addition to the $refs and document.getElementById() methods, Vue also provides a $el attribute to get the root element of the current component. In a Vue component, you can use this.$el to get the root element of the current component. The following is an example:

<template>
  <div id="myComponent">
    <button id="myButton" @click="doSomething">Click me</button>
  </div>
</template>

<script>
export default {
  methods: {
    doSomething() {
      const component = this.$el;
      const button = component.querySelector('#myButton');
      console.log(button.id); // 输出元素的ID
    },
  },
};
</script>

In the above code, we can see that the root element of the component has an id attribute as "myComponent", and then we can use this.$el to get a reference to the root element , and then obtain the reference of the child element

through the component.querySelector('#myButton') method, and finally access its id attribute.

Conclusion

In short, Vue provides multiple methods to obtain the content of CSS ID. Developers can choose the appropriate method according to actual needs. Either way, they allow developers to develop Vue applications more efficiently.

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