Typescriptでイベント発生元の情報を取りたい時に、Javascriptのノリで書いていたら怒られた 具体的には下記 inputのvalueをとろうとしたら、んなもんねぇよ!と怒られた var element = document.createElement('input'); element.value = 'test'; element.addEventListener('click', function(event: MouseEvent) { alert(event.target.value); // Property 'value' does not exist on type 'EventTarget'. }, false); element.click(); EventTargetにはHTMLElementが必ずしも来るわけでないらしい https://develope
![TypescriptでaddEventListener時のEventTarget型ではまった - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/6f1e35712d1ce18b68f5787eda6ca9510cd884fa/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk3MiZoPTM3OCZ0eHQ9VHlwZXNjcmlwdCVFMyU4MSVBN2FkZEV2ZW50TGlzdGVuZXIlRTYlOTklODIlRTMlODElQUVFdmVudFRhcmdldCVFNSU5RSU4QiVFMyU4MSVBNyVFMyU4MSVBRiVFMyU4MSVCRSVFMyU4MSVBMyVFMyU4MSU5RiZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTU2JnM9MDQwNTU3ZGZkNjFjMjk0YzAwYTZmMjQwZjYyNGQ4OWY%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDB3YW1laSZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTM2JnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9N2IyOTM5N2EwZmQ2Mjc1NTdlZjhkNmQ1YjNmNjhkMGI%26blend-x%3D142%26blend-y%3D486%26blend-mode%3Dnormal%26s%3Dce974cc35111b20d3ff1b63ed6c42a90)