Closed
Bug 1363684
Opened 7 years ago
Closed 4 years ago
tip faster js offsetwith
Categories
(Developer Documentation Graveyard :: JavaScript, enhancement, P5)
Tracking
(Not tracked)
RESOLVED
WONTFIX
People
(Reporter: peter.mlich, Unassigned)
References
()
Details
:: Developer Documentation Request Request Type: Correction Gecko Version: 55 Branch Technical Contact: :: Details I trying find fast method to detect position and widht columns of table with 800 rows. OffsetWidth is slow. I find something in google. Somebody 1 - use create div, append body, innerHTML text, get offsetWidth Somebody 2 - use canvas, put text, get metric width 2 is faster (tnative = 410, t1 = 460, t2 = 80). function getTextWidth(text, font) { // re-use canvas object for better performance var canvas = getTextWidth.canvas || (getTextWidth.canvas = document.createElement("canvas")); var context = canvas.getContext("2d"); context.font = font; var metrics = context.measureText(text); return metrics.width; } getTextWidth.canvas = document.createElement("canvas")
Comment 1•4 years ago
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MDN Web Docs' bug reporting has now moved to GitHub. From now on, please file content bugs at https://github.com/mdn/sprints/issues/ and platform bugs at https://github.com/mdn/kuma/issues/.
Status: UNCONFIRMED → RESOLVED
Closed: 4 years ago
Resolution: --- → WONTFIX
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Description
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