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Breakpoints in web design are defined thresholds based on screen width, such as 320px, 480px, 768px, 1024px, 1440px, etc. At these thresholds, the elements of a web page adjust to fit different screen sizes. These thresholds can be determined manually based on an existing design or by following commonly used standard widths. For example, the display width of an iPhone model (320×480) can constitute a significant breakpoint in the layout. Breakpoints are also known as breakpoints in French.

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