设置窗口的宽度（以像素为单位）。最小值为250，指定浏览器内容区域的最小宽度。
Sets the width of the window in pixels. The minimum value is 250, and specifies the minimum width of the browsers content area.
设置窗口的宽度（以像素为单位）。最小值为250，指定浏览器内容区域的最小宽度。
Sets the width of the window in pixels. The minimum value is 250, and specifies the minimum width of the browsers content area.
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