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Bagaimanakah Saya Boleh Mencipta Textareas Penyesuaian Sendiri dalam JavaScript?

Patricia Arquette

Dec 15, 2024 am 06:30 AM

How Can I Create Self-Adjusting Textareas in JavaScript?

Auto-height Textareas

Satu cabaran biasa apabila bekerja dengan textareas ialah memastikan mereka melaraskan ketinggiannya untuk menampung input pengguna tanpa memerlukan bar skrol. Kebimbangan ini timbul dalam senario di mana kandungan textarea sering berbeza-beza panjangnya. Begini cara anda boleh mencapainya menggunakan JavaScript tulen:

Coretan kod yang disediakan memanfaatkan fungsi JavaScript bernama auto_grow yang melaraskan ketinggian kawasan teks secara dinamik berdasarkan kandungannya:

function auto_grow(element) {
  element.style.height = "5px";
  element.style.height = (element.scrollHeight) + "px";
}

Salin selepas log masuk

Dalam CSS, anda boleh menentukan gaya berikut untuk mengalih keluar bar skrol dan menetapkan minimum dan maksimum ketinggian:

textarea {
  resize: none;
  overflow: hidden;
  min-height: 50px;
  max-height: 100px;
}

Salin selepas log masuk

Untuk melaksanakan fungsi ini, cuma tambahkan atribut oninput pada elemen, memanggil fungsi auto_grow apabila pengguna menaip:</p> <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false"><textarea oninput="auto_grow(this)"></textarea></pre><div class="contentsignin">Salin selepas log masuk</div></div> <p>Dengan pelaksanaan ini, kawasan teks anda akan melaraskan ketinggiannya secara automatik agar sepadan dengan panjang kandungannya, memberikan pengalaman pengguna yang lancar tanpa memerlukan bar skrol .</p><p>Atas ialah kandungan terperinci Bagaimanakah Saya Boleh Mencipta Textareas Penyesuaian Sendiri dalam JavaScript?. Untuk maklumat lanjut, sila ikut artikel berkaitan lain di laman web China PHP!</p> </div> </div> <div class="wzconShengming_sp"> <div class="bzsmdiv_sp">Kenyataan Laman Web ini</div> <div>Kandungan artikel ini disumbangkan secara sukarela oleh netizen, dan hak cipta adalah milik pengarang asal. 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