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Message: <blockquote data-quote="codeguru" data-source="post: 67" data-attributes="member: 2"><img src="https://davidwalsh.name/demo/2019/10/davidwash-qr-code.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /> QR codes aren’t everyone’s cup of tea but I quite like them. If I see something I want to remember or check out later, especially when on the road, it’s super easy to take a quick picture — it’s much easier than trying to remember a URL and much faster than typing it in on a tiny keyboard.If you need to generate QR codes, for a client or yourself, there’s a really nice JavaScript project: <a href="https://github.com/soldair/node-qrcode" target="_blank">node-qrcode</a>. Let’s look at the different wys and output formats you can use to create a QR code!Start by installing the library:[ICODE]yarn add qrcode[/ICODE]<h2>Create QR Code Image Data</h2>With the QR code utility available, you can generate a data URI for the QR code which you can use with an [ICODE]<img>[/ICODE] element:const generateQR = async text => {  try {    console.log(await QRCode.toDataURL(text))  } catch (err) {    console.error(err)  }}generateQR("<a href="https://davidwalsh.name" target="_blank">https://davidwalsh.name</a>");/*data:image/png;base64,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*/<h2>Create a QR Code in Terminal</h2>If you want to see the QR code in the terminal via Node.js, you can do so by passing a config object:const generateQR = async text => {  try {    console.log(await QRCode.toString(text, {type: 'terminal'}))  } catch (err) {    console.error(err)  }}<img src="https://davidwalsh.name/demo/2019/10/qr-code-terminal-1024x646.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /><h2>Create a QR Code Image</h2>You can generate a PNG, SVG, or UTF8 image for the QR code:const generateQR = async text => {  try {    await QRCode.toFile('./davidwash-qr-code.png', text);  } catch (err) {    console.error(err)  }}<h2>Create a QR Code on Canvas</h2>If you use a utility like Browserify and webpack, you can use [ICODE]qrcode[/ICODE] on the client side:var canvas = document.getElementById('canvas');const generateQR = async text => {  try {    await QRCode.toCanvas(canvas, text)  } catch (err) {    console.error(err)  }}generateQR("<a href="https://davidwalsh.name" target="_blank">https://davidwalsh.name</a>");This awesome QR code library also allows you to create much more than I’ve shown here, including binary data and with a variety of options. If you need to create a QR code, look no further than <a href="https://github.com/soldair/node-qrcode" target="_blank">node-qr</a> code!The post <a href="https://davidwalsh.name/create-qr-code" target="_blank">How to Create a QR Code</a> appeared first on <a href="https://davidwalsh.name" target="_blank">David Walsh Blog</a>.<a href="https://tkjs.us/dwb" target="_blank"><img src="https://davidwalsh.name/demo/tjs_block-1.svg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a><a href="https://davidwalsh.name/create-qr-code" target="_blank">Continue reading...</a></blockquote>

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