let user enter max length not more code example

Example 1: simple way to make a text field to accept numbers only with maximum number of length 13 digit and min 10

<input name="phoneNumber"
    oninput="javascript: if (this.value.length > this.maxLength) this.value = this.value.slice(0, this.maxLength);"
    type = "number"
    maxlength = "10"
 />

Example 2: input max length

<input maxlength="10" />