css border hidden

With the continuous development of front-end technology, the application scope of CSS is also constantly expanding. When developing web pages, it is often necessary to use CSS to achieve various style effects. Among them, border is a commonly used CSS style. It can add outer borders to page elements and control the size, color, style and other properties of the border. However, sometimes we need to hide the border, then we need to use CSS border hiding techniques.

CSS border hiding techniques can be used in a variety of situations, such as when you need to cancel the default element border style, when you need to implement a custom border style for an element style, or when you need to use the border attribute but do not need an element. Has the appearance of a border, etc.

In conventional CSS properties, there are two common ways to implement hidden borders: one is to use the transparent attribute to hide the border, and the other is to use the outline attribute instead of the border attribute to achieve the border effect. Next, the specific implementation of these two methods and their advantages and disadvantages will be introduced in detail.

1. Use transparent to hide the border

In CSS, we can add a border to an element and set its style, size, color and other attributes. However, if we want to completely hide the border, We can use the transparent attribute to achieve this. The sample code is as follows:

/*隐藏边框样式1*/
.border-hidden1{
  border: 1px solid transparent;
}
/*隐藏边框样式2*/
.border-hidden2{
  border: none;
}

In the above code, the .border-hidden1 style can set the border line color to transparent and the border width to 1 pixel. This method is very useful when you need the original border style but don't want it to be displayed. At the same time, the above code also provides another way .border-hidden2, which is to cancel the border. This method is more commonly used, but it should be noted that the way the element's padding and margin align the border may change after the border is cancelled. You can appropriately adjust the padding and margin properties of the element to implement the layout alignment style.

2. Use outline instead of border

In CSS, we can also use the outline attribute to achieve the border effect. Outline can be understood as "outer outline", and its implementation is the same as Border is similar. The sample code is as follows:

/*隐藏边框样式3*/
.border-hidden3{
  outline: none;
}

Similar to the border hiding method 2, this method also defines the style of the outline attribute as none to hide the border. At the same time, using outline to clear the border will not interfere with the padding and margin attributes, so it is more practical to use outline instead of border. Moreover, the difference between using the outline attribute and the border attribute is that the outline attribute can set the outer border line of the element independently, while the style and width of the border must be defined together.

Summary

When we need to hide the borders of web page elements, we can use the transparent attribute or the outline attribute to achieve this. Both methods have their own advantages and disadvantages. The transparent method allows the element to retain the default border style; while using outline will be more flexible when you need to customize the element border style and will not be affected by padding and margin. Of course, you should choose which method to use according to your own needs.

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