top
top
้จ่ไธๅ็ position
่จญๅฎ๏ผ่ๆไธๅ็ๆๆ๏ผ
absolute
orfixed
๏ผ ่ชๅทฑไธๆน outer margin ๅฐ็ถๅฎนๅจไธๆน็ inner border ็่ท้ขใrelative
๏ผ่ชๅทฑ (ๅพๆญฃๅธธไฝ็ฝฎ) ๅพไธ็งปๅ็่ท้ขใsticky
๏ผtop
property is used to compute the sticky-constraint rectangle.static
๏ผtop
็กๆๆใ
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