ass="qm-api-header-tags"></span></div></span><span class="qm-changelog-javascript-method"><div class="qm-api-item-header qm-api-item-header-function"><span class="qm-api-javascript-header-function-signature qm-api-header-details qm-code-font" id="on"><span class="qm-api-javascript-header-function-name">on</span><span class="qm-api-javascript-header-function-args"></span><span class="qm-api-javascript-header-function-returns"><span class="qm-api-type"><a class="qm-api-type-link" href="/docs/event-emitter/#ev