What is the attribute of css to set font thickness?

The css attribute for setting font thickness is the font-weight attribute. The values ​​of this attribute are "lighter", "normal", "bold" and "bolder"; "lighter" is thin, "normal" is normal weight, "bold" is bold, and "bolder" is extra bold.

The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.

In CSS, the font-weight attribute is used to set the thickness value of the font. The value is lighter | normal | bold | bolder, and the default is normal. Lighter is a thin font, normal is a normal weight, bold is a bold font, and bolder is an extra bold font. For example:

.lighter {
 font-weight: lighter;
} 
.normal {
 font-weight: normal;
}
.bold {
 font-weight: bold;
}
.bolder {
 font-weight: bolder;
}

字体粗细： lighter
字体粗细： normal
字体粗细： bold
字体粗细： bolder

The above code defines 4 fonts of different thicknesses, which become thicker in order. The running result is as shown in the figure:

[Recommended tutorial: CSS video tutorial]

In order to achieve more detailed control, CSS It is also allowed to use numbers to set the font weight. The number must be an integer multiple of 100, and the value is between 100 and 900. The larger the value, the bolder the font. 400 is equivalent to normal and 700 is equivalent to bold. The results of different values ​​are as shown in the figure:

The browser will automatically add bold format to some elements (such as strong, h1~h6 and b). Some elements It also inherits the bold format of the parent element, and can cancel the bold format of these elements through font-weight: normal.

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