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                <h1>text spacing bookmarklet</h1>

<p>Quick and dirty testing of <a href="">WCAG 2.1 Success Criterion 1.4.12 Text Spacing</a>.

<p>Experimental:<strong>use at own risk!</strong></p>
<p>Bookmarklet: <a href="javascript:(function(){var d=document,id='phltsbkmklt',el=d.getElementById(id),f=d.querySelectorAll('iframe'),i=0,l=f.length;if(el){function removeFromShadows(root){for(var el of root.querySelectorAll('*')){if(el.shadowRoot){el.shadowRoot.getElementById(id).remove();removeFromShadows(el.shadowRoot);}}}el.remove();if(l){for(i=0;i<l;i++){try{f[i].contentWindow.document.getElementById(id).remove();removeFromShadows(f[i].contentWindow.document);}catch(e){console.log(e)}}}removeFromShadows(d);}else{s=d.createElement('style');;s.appendChild(d.createTextNode('*{line-height:1.5 !important;letter-spacing:0.12em !important;word-spacing:0.16em !important;}p{margin-bottom:2em !important;}'));function applyToShadows(root){for(var el of root.querySelectorAll('*')){if(el.shadowRoot){el.shadowRoot.appendChild(s.cloneNode(true));applyToShadows(el.shadowRoot);}}}d.getElementsByTagName('head')[0].appendChild(s);for(i=0;i<l;i++){try{f[i].contentWindow.document.getElementsByTagName('head')[0].appendChild(s.cloneNode(true));applyToShadows(f[i].contentWindow.document);}catch(e){console.log(e)}}applyToShadows(d);}})();">Text Spacing</a>  (drag to bookmarklets bar or right click and save as bookmark)
<p><a href="">Edit this</a> on codepen</p>
 <p>Last updated 6th September 2021, now traverses shadow dom, <b>thanks to <a href="">@shoffing</a></b></p>
 <p>updated 18th May 2021. Now toggles on/off (first time you run it, it adds the styles ... second time, it removes them again) <b>Thanks to Patrick H. Lauke</b></p>
<p>updated 7 October 2020. Now works on content inside same-origin first level <code>iframe</code>s - i.e. it doesn't then work if there's an <code>iframe</code> inside another <code>iframe</code>. <b>Thanks to Patrick H. Lauke and Jon Gibbins</b></p>



                /* rules for bookmarklet test
* {
 line-height: 1.5 !important;
 letter-spacing: 0.12em !important;
 word-spacing: 0.16em !important;

 margin-bottom: 2em !important;
} */