<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><style>body{ margin:0px}div{ background-color:#0F9; width:200px; height:100px; } #div1{background-color:#00F;float:left;}#div2{background-color:#FF0;}</style></head><body><div id="div1">盒子1</div><div id="div2">盒子2</div><div id="div3">盒子3</div></body></html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><style>body{ margin:0px}div{ background-color:#0F9; width:200px; height:100px; position:relative; } #div1{background-color:#00F;}#div2{background-color:#FF0;}</style></head><body><div id="div1">盒子1</div><div id="div2">盒子2</div><div id="div3">盒子3</div></body></html>Yes Because 1 squeezes 2 out
#div1{background-color:#00F;float:left;} causes box 1 to float out of the text flow, so box 2 occupies the position of the original box 1, and box 1 floats It covers Box 2, but the text of Box 2 needs to wrap around Box 1, so it is squeezed below. The margin between box 3 and box 2 is: 0, so box 3 covers the extruded text of box 2. So it’s not that box 2 and box 3 overlap. Second, the text in box 2 is extruded and then covered by box 3.
You can set up border verification.
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