How to change font-weight for every keypress in javascript

Question

I am new to coding and am working on a code for a variable font, that I created, so that every letter you type changes font weight (and gets heavier). I already have a code where all letters get heavier at once, and one where font-size changes but I can't figure out how to rewrite that code, so that not the font-size but the font-weight changes. Thank you in advance for your help!

 let initWeight = 101; document.getElementById("testarea").onkeypress = function(event) { myFunction(event.key) }; function myFunction(letter) { initWeight += 50; const letterHTML = '<span style="font-size:' + initWeight + 'px">' + letter + '</span>' document.getElementById("result").innerHTML += letterHTML }

 @import { https: //static.wixstatic.com/ufonts/5bda5f_04476cfbcbfe4a349a33e0080a539b44/woff2/file.woff2} @font-face { font-family:wf_04476cfbcbfe4a349a33e0080; src: url("https://static.wixstatic.com/ufonts/5bda5f_04476cfbcbfe4a349a33e0080a539b44/woff2/file.woff2") format("woff2"); font-weight: 101 900 } div { font-family: 'wf_04476cfbcbfe4a349a33e0080', sans-serif; font-weight: 101; font-size: 100px; }

 <div class="myInput" id="testarea" contentEditable="true"> insert text </div> <div id="result" contentEditable="true"></div>

Answer 1

Don't you just mean

'<span style="font-weight:' + initWeight + '">'

 let initWeight = 100; document.getElementById("testarea").onkeypress = function(event) { myFunction(event.key) }; function myFunction(letter) { const letterHTML = '<span style="font-weight:' + initWeight + '">' + letter + '</span>' document.getElementById("result").innerHTML += letterHTML initWeight += 100; }

 @import { https: //static.wixstatic.com/ufonts/5bda5f_04476cfbcbfe4a349a33e0080a539b44/woff2/file.woff2} @font-face { font-family:wf_04476cfbcbfe4a349a33e0080; src: url("https://static.wixstatic.com/ufonts/5bda5f_04476cfbcbfe4a349a33e0080a539b44/woff2/file.woff2") format("woff2"); font-weight: 101 900 } div { font-family: 'wf_04476cfbcbfe4a349a33e0080', sans-serif; font-weight: 101; font-size: 100px; }

 <div class="myInput" id="testarea" contentEditable="true"> insert text </div> <div id="result" contentEditable="true"></div>

Answer 2

Try with keyup event. maybe it can solve your problem