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Here we are using a regular expression to match an attribute that starts with <code>foo-</code>:</p> <pre><code class="language-js">callbacks.attr(/foo-[\w\.]+/, function(el, attrData){ // Get the part after foo- var attrValue = attrData.attributeName.substr(4); // Set it's content el.textContent = attrValue; }); </code></pre> <p>So that:</p> <pre><code class="language-html"><div foo-bar></div> </code></pre> <p>Renders as:</p> <pre><code class="language-html"><div foo-bar>bar</div> </code></pre> </section> <script type="text/javascript"> var docObject = {"src":{"path":"node_modules/can-view-callbacks/docs/can-view-callbacks.md"},"description":"Registered callbacks for behaviors \n","type":"module","title":"can-view-callbacks","types":[{"type":"Object","options":[]}],"name":"can-view-callbacks","parent":"can-infrastructure","package":{"_args":[[{"raw":"can-view-callbacks@3.0.1","scope":null,"escapedName":"can-view-callbacks","name":"can-view-callbacks","rawSpec":"3.0.1","spec":"3.0.1","type":"version"},"/Users/kevin/dev/canjs"]],"_from":"can-view-callbacks@3.0.1","_id":"can-view-callbacks@3.0.1","_inCache":true,"_location":"/can-view-callbacks","_nodeVersion":"6.9.1","_npmOperationalInternal":{"host":"packages-18-east.internal.npmjs.com","tmp":"tmp/can-view-callbacks-3.0.1.tgz_1478714784812_0.6401787921786308"},"_npmUser":{"name":"phillipskevin","email":"kphillips86@gmail.com"},"_npmVersion":"3.10.8","_phantomChildren":{},"_requested":{"raw":"can-view-callbacks@3.0.1","scope":null,"escapedName":"can-view-callbacks","name":"can-view-callbacks","rawSpec":"3.0.1","spec":"3.0.1","type":"version"},"_requiredBy":["/","/can-component","/can-connect","/can-legacy-view-helpers","/can-stache","/can-stache-bindings","/can-view-href","/can-view-import","/can-view-live"],"_resolved":"https://registry.npmjs.org/can-view-callbacks/-/can-view-callbacks-3.0.1.tgz","_shasum":"82f9fd2f791c2ba64c5de72713b061743626b5b3","_shrinkwrap":null,"_spec":"can-view-callbacks@3.0.1","_where":"/Users/kevin/dev/canjs","author":{"name":"Bitovi","email":"contact@bitovi.com","url":"http://bitovi.com"},"bit-docs":{"dependencies":{"bit-docs-glob-finder":"^0.0.5","bit-docs-dev":"^0.0.3","bit-docs-js":"^0.0.3","bit-docs-generate-readme":"^0.0.8"},"glob":{"pattern":"**/*.{js,md}","ignore":"node_modules/**/*"},"readme":{"apis":"./doc/apis.json"},"parent":"can-view-callbacks"},"browser":{"transform":["cssify"]},"browserify":{"transform":["cssify"]},"bugs":{"url":"https://github.com/canjs/can-view-callbacks/issues"},"dependencies":{"can-observation":"^3.0.1","can-util":"^3.0.1"},"description":"Registered callbacks for behaviors","devDependencies":{"bit-docs":"0.0.7","cssify":"^1.0.2","done-serve":"^0.2.0","donejs-cli":"^0.9.5","generator-donejs":"^0.9.0","jshint":"^2.9.1","steal":"^0.16.0","steal-qunit":"^0.1.1","steal-tools":"^0.16.0","testee":"^0.2.4"},"directories":{},"dist":{"shasum":"82f9fd2f791c2ba64c5de72713b061743626b5b3","tarball":"https://registry.npmjs.org/can-view-callbacks/-/can-view-callbacks-3.0.1.tgz"},"gitHead":"41cd0d20400fa872ed120bba505cd55fce2a7fa7","homepage":"http://canjs.com","keywords":["canjs","canjs-plugin","donejs"],"main":"can-view-callbacks","maintainers":[{"name":"daffl","email":"daff@neyeon.de"},{"name":"justinbmeyer","email":"justin@bitovi.com"},{"name":"matthewp","email":"matthew@matthewphillips.info"},{"name":"phillipskevin","email":"kphillips86@gmail.com"},{"name":"sinjhin","email":"john@ardea.io"}],"name":"can-view-callbacks","optionalDependencies":{},"readme":"ERROR: No README data found!","repository":{"type":"git","url":"git://github.com/canjs/can-view-callbacks.git"},"scripts":{"build":"node build.js","develop":"done-serve --static --develop --port 8080","document":"bit-docs","jshint":"jshint ./*.js --config","postversion":"git push --tags && git checkout master && git branch -D release && git push","preversion":"npm test && npm run build","release:major":"npm version major && npm publish","release:minor":"npm version minor && npm publish","release:patch":"npm version patch && npm publish","release:pre":"npm version prerelease && npm publish","test":"npm run jshint && npm run testee","testee":"testee test/test.html --browsers firefox","version":"git commit -am \"Update dist for release\" && git checkout -b release && git add -f dist/"},"system":{"configDependencies":["live-reload"],"npmAlgorithm":"flat"},"version":"3.0.1"},"comment":" ","pathToRoot":".."}; </script> </article> <footer><p>CanJS is part of <a href="http://donejs.com" target="_blank">DoneJS</a>. 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