表单

<form>...</form>

action="url"

method=""

enctype=""

autocomplete

novalidate

accept-charsets

target

<fieldset>...</fieldset>

<label>...</label>

<legend>...</legend>

<input />

type=""

name=""

value=""

size=""

maxlength=""

step=""

width=""

height=""

placeholder=""

pattern=""

min=""

max=""

required

autofocus

disabled

<textarea>...</textarea>

<select>...</select>

name=""

size=""

mutiple

required

autofoucs

<optgroup>...</optgroup>

<option>...</option>

value=""

selected

<button>...</button>

示例

Live Editor

<form action="action page.php" method="post"> <fieldset> <legend>Personal information: </legend> First name : <input type=" text" name=" first name" value="Mickey" placeholder="First Name" /> <br /> Last name: <input type="text" name=" lastname" value="Mouse" placeholder="Last Name " /> <br /> Favorite car brand: <select> <option value="volvo">Volvo</option> <option value="saab">Saab</option> <option value="mercedes">Mercedes</option> <option value="audi">Audi</option> </select> <br /> <textarea name="description"></textarea> <br /> <input type="submit" value="Submit" /> </fieldset> </form>

<form action="action page.php" method="post">
  <fieldset>
    <legend>Personal information: </legend>
    First name : <input
      type=" text"
      name=" first name"
      value="Mickey"
      placeholder="First Name"
    />
    <br />
    Last name: <input
      type="text"
      name=" lastname"
      value="Mouse"
      placeholder="Last Name "
    />
    <br />
    Favorite car brand:
    <select>
      <option value="volvo">Volvo</option>
      <option value="saab">Saab</option>
      <option value="mercedes">Mercedes</option>
      <option value="audi">Audi</option>
    </select>
    <br />
    <textarea name="description"></textarea>
    <br />
    <input type="submit" value="Submit" />
  </fieldset>
</form>

Result

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