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JavaScript and SVG: how do you increase the clickable area for an onClick event?

My script draws lines on the screen with a stroke width of 3. The size of the lines is perfect (visual), but they are not very easy to click.

As an example:

<html> <head> <script> function selectStrand(evt) { current_id = evt.target.getAttributeNS(null, "id"); document.getElementById('main').innerHTML = current_id; } </script> </head> <body> Selected line: <span id="main"></span> <?xml version="1.0"?> <svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="100%" height="100%" preserveAspectRatio="xMinYMin meet" viewBox="0 0 1000 1000"> <g id="buffer" transform="translate(10,0)"> <line id="blue-blue" x1="50" y1="50" x2="500" y2="50" style="stroke:blue; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/> <line id="blue-orange" x1="50" y1="70" x2="500" y2="70" style="stroke:orange; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/> <line id="blue-green" x1="50" y1="90" x2="500" y2="90" style="stroke:green; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/> <line id="blue-brown" x1="50" y1="110" x2="500" y2="110" style="stroke:brown; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/> <line id="blue-grey" x1="50" y1="130" x2="500" y2="130" style="stroke:grey; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/> <line id="blue-khaki" x1="50" y1="150" x2="500" y2="150" style="stroke:khaki; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/> <line id="blue-red" x1="50" y1="170" x2="500" y2="170" style="stroke:red; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/> <line id="blue-black" x1="50" y1="190" x2="500" y2="190" style="stroke:black; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/> <line id="blue-yellow" x1="50" y1="210" x2="500" y2="210" style="stroke:yellow; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/> <line id="blue-purple" x1="50" y1="230" x2="500" y2="230" style="stroke:purple; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/> <line id="blue-pink" x1="50" y1="250" x2="500" y2="250" style="stroke:pink; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/> <line id="blue-cyan" x1="50" y1="270" x2="500" y2="270" style="stroke:cyan; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/> </g> </g> </svg> </body> </html>

Is there an easy way to increase the area around each of the lines to make them easier?

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2 answers

For each line, try drawing a transparent line on top of it with a larger stroke width and set onclick on it.

+8
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The answer is above. For a classroom group of selection effect, each thin line and a transparent combination of lines in a group with a thin line on top. Set onclick to the group and then animate the thick line transparency in your onclick.

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Source: https://habr.com/ru/post/907506/

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