type number maxlength
last update:
2020/04/01
<!doctype html>
<title>title</title>
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1, maximum-scale=1, viewport-fit=cover">
<input type="number" value="" maxlength="6" pattern="\d*" oninput="javascript: if (this.value.length > this.maxLength) this.value = this.value.slice(0, this.maxLength);">
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