Created
April 20, 2020 20:50
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Scroll</title> | |
| </head> | |
| <body> | |
| <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br> | |
| <div name="spot">001</div> | |
| <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br> | |
| <div name="spot">002</div> | |
| <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br> | |
| <div name="spot">003</div> | |
| <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br> | |
| <div name="spot">004</div> | |
| <script> | |
| let i=-1; | |
| document.body.addEventListener( "mouseup", (e)=>{ | |
| let ary = document.querySelectorAll( "div[name='spot']"); | |
| i = (i + 1) % ary.length; | |
| let a = ary[ i ]; | |
| window.scroll( 0, offset_top( a ) ); | |
| }); | |
| function offset(el) { | |
| var rect = el.getBoundingClientRect(), | |
| scrollLeft = window.pageXOffset || document.documentElement.scrollLeft, | |
| scrollTop = window.pageYOffset || document.documentElement.scrollTop; | |
| return rect.top + scrollTop; | |
| return { top: rect.top + scrollTop, left: rect.left + scrollLeft } | |
| } | |
| function offset_top( elm ){ | |
| let rect = elm.getBoundingClientRect(); | |
| return rect.top + ( window.pageYOffset || document.documentElement.scrollTop ); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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