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<form> <input type="email" id="email" name="email" value="email@" /> <button type="button" id="btn-test">Test</button> </form>
document.addEventListener("DOMContentLoaded", () => { const $elEmail = document.getElementById("email"); const $elBtnTest = document.getElementById("btn-test"); $elBtnTest.onclick = e => { if(!$elEmail.validity.valid) { console.log($elEmail.validationMessage); } }; });
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by DevDic
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