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javascript - 如何在每个单词的首字母大写的情况下打印用户输入？

转载 作者：塔克拉玛干 更新时间：2023-11-02 22:44:54 25 4
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我正在处理一个表单，并希望打印用户的输入，无论他们如何输入，每个单词的首字母都大写。例如，我希望用户的“ronALd SmItH”打印为 Rondald Smith。我也想为地址和城市做这个。我已经阅读了此处所有类似的问题和答案，但它们对我不起作用。我不确定我是否将代码放在错误的位置或我做错了什么。这是我正在使用的代码:

    function correctFormat(customer)
    {
      var first = customer.charAt(0).toUpperCase();
      var rest = customer.substring(1).toLowerCase();
      return first + rest;
    }

我试过将它放在整个文档的不同位置，我试过重命名字符串(例如名称、城市、地址)。我还阅读了此处的其他帖子，其中的问题似乎与此相同，但没有一个有效。我没有输入要大写的字符串。用户正在将他们的数据输入表格，我需要它以正确的格式打印在警报中。这是整个文档中的上述代码。很抱歉这么长，但我又一次不知所措。

<html>

<!--nff Add a title to the Web Page.-->

<head>
<title>Pizza Order Form</title>
<script>

/*nff Add the doClear function to clear the information entered by the user and enter the information to be cleared when the clear entries button is clicked at the bottom of the Web Page.*/
function doClear()
{
var elements = document.getElementsByTagName('select');
elements[0].value = 'PA';

  document.PizzaForm.customer.value = "";
  document.PizzaForm.address.value = "";
  document.PizzaForm.city.value = "";
  document.PizzaForm.state.value = "";
  document.PizzaForm.zip.value = "";
  document.PizzaForm.phone.value = "";
  document.PizzaForm.email.value = "";

  document.PizzaForm.sizes[0].checked = false;
  document.PizzaForm.sizes[1].checked = false;
  document.PizzaForm.sizes[2].checked = false;
  document.PizzaForm.sizes[3].checked = false;

  document.PizzaForm.toppings[0].checked = false;
  document.PizzaForm.toppings[1].checked = false;
  document.PizzaForm.toppings[2].checked = false;
  document.PizzaForm.toppings[3].checked = false;
  document.PizzaForm.toppings[4].checked = false;
  document.PizzaForm.toppings[5].checked = false;
  document.PizzaForm.toppings[6].checked = false;
  document.PizzaForm.toppings[7].checked = false;
  document.PizzaForm.toppings[8].checked = false;
  return;
}

//nff Add a doSubmit button to indicate what the outcome will be when the user clicks the submit order button at the bottom of the form.
function doSubmit()

/*nff Add an if statement to the doSubmit function to return false if there is missing information in the text fields once the user clicks the submit order button.*/

{
  if (validateText() == false) {
    return false;
  }

//nff Add an if statement to the doSubmit function to return false if there is no pizza size selected using the radio buttons.

  if (validateRadio() == false) {
    return false;
  }

//nff Add an if statement to the doSubmit function to return false if there are no toppings selected using the checkboxes.

  if (validateCheckbox() == false) {
    return false;
  }

//nff Add an if statement to the doSubmit function to return false if the email entered by the user is empty or does not fit the acceptable format.

  if (validateEmail() == false) {
    return false;
  }

/*nff Add an if statement to the doSubmit function to return false if the phone number entered by the user is empty or does not fit the acceptable formats.*/

  if (validatePhone() == false) {
    return false;
  }

  if (validateZip() == false) {
    return false;
  }

//nff Add an alert box to show customer information from text fields when the Submit Order button is clicked.

  var customer = document.PizzaForm.customer.value;
  var address = document.PizzaForm.address.value;
  var city = document.PizzaForm.city.value;
  var state = document.PizzaForm.state.value;
  var zip = document.PizzaForm.zip.value;
  var phone = document.PizzaForm.phone.value;
  var email = document.PizzaForm.email.value;

  var size = "";
  for (var i = 0; i < document.PizzaForm.sizes.length; i++) {
    if (document.PizzaForm.sizes[i].checked) {
      size = document.PizzaForm.sizes[i].nextSibling.nodeValue.trim();
      break;
    }
  }

  var toppings = [];
  for (var i = 0; i < document.PizzaForm.toppings.length; i++) {
    if (document.PizzaForm.toppings[i].checked) {
      toppings.push(document.PizzaForm.toppings[i].nextSibling.nodeValue.trim());
    }
  }


  alert("Name: " + customer + '\n' +
    "Address: " + address + '\n' +
    "City: " + city + '\n' +
    "State: " + state + '\n' +
    "Zip: " + zip + '\n' +
    "Phone: " + phone + '\n' +
    "Email: " + email + '\n' +
    "Size: " + size + '\n' + (toppings.length ? 'Toppings: ' + toppings.join(', ') : ''));
}

//nff Add the validateText function to ensure that all text fields are complete before the order is submitted.

function validateText() {
  var customer = document.PizzaForm.customer.value;
  if (customer.length == 0) {
    alert('Name data is missing');
    document.PizzaForm.customer.focus();
    return false
  };
  var address = document.PizzaForm.address.value;
  if (address.length == 0) {
    alert('Address data is missing');
    return false;
  }
  var city = document.PizzaForm.city.value;
  if (city.length == 0) {
    alert('City data is missing');
    return false;
  }
  var state = document.PizzaForm.state.value;
  if (state.length == 0) {
    alert('State data is missing');
    return false;
  }
  var zip = document.PizzaForm.zip.value;
  if (zip.length == 0) {
    alert('Zip data is missing');
    return false;
  }
  var phone = document.PizzaForm.phone.value;
  if (phone.length == 0) {
    alert('Phone data is missing');
    return false;
  }
  var email = document.PizzaForm.email.value;
  if (email.length == 0) {
    alert('Email data is missing');
    return false;
  }
  return true;
}

//nff Add the validateRadio function so that if none of the radio buttons for pizza size are selected it will alert the user.

function validateRadio() {
  if (document.PizzaForm.sizes[0].checked) return true;
  if (document.PizzaForm.sizes[1].checked) return true;
  if (document.PizzaForm.sizes[2].checked) return true;
  if (document.PizzaForm.sizes[3].checked) return true;
  alert('Size of pizza not selected');
  document.PizzaForm.sizes[0].foucs();
  return false;
}

//nff Add the validateCheckbox function so that if none of the checkboxes for toppings are selected it will alert the user.

function validateCheckbox() {
  if (document.PizzaForm.toppings[0].checked) return true;
  if (document.PizzaForm.toppings[1].checked) return true;
  if (document.PizzaForm.toppings[2].checked) return true;
  if (document.PizzaForm.toppings[3].checked) return true;
  if (document.PizzaForm.toppings[4].checked) return true;
  if (document.PizzaForm.toppings[5].checked) return true;
  if (document.PizzaForm.toppings[6].checked) return true;
  if (document.PizzaForm.toppings[7].checked) return true;
  if (document.PizzaForm.toppings[8].checked) return true;
  alert ('Toppings are not selected');
  return false;
  }

//nff Add the validateEmail function to ensure that the email address has been entered in the correct format.

function validateEmail() {  
 if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{3,4})+$/.test(PizzaForm.email.value))  
  {  
    return (true)  
  }  
    alert("You have entered an invalid email address")  
    return (false)  
} 

//nff Add the validatePhone function to ensure that the phone number has been entered in any of the acceptable formats.

function validatePhone() {
  if (/^[(]{0,1}[0-9]{3}[)]{0,1}[-\s\.]{0,1}[0-9]{3}[-\s\.]{0,1}[0-9]{4}$/.test(PizzaForm.phone.value))
  {
    return (true)
  }
    alert("You have entered an invalid phone number")
    return (false)
}
function validateZip() {
  if (/^\d{5}([\-]\d{4})?$/.test(PizzaForm.zip.value))
  {
    return (true)
  }
    alert("You have entered an invalid zip")
    return (false)
}
function correctFormat(customer)
{
  var first = customer.charAt(0).toUpperCase();
  var rest = name.substring(1).toLowerCase();
  return first + rest;
}
</script>
</head>

<body>

<!--nff Add a form for the user to enter information into.-->

  <form name="PizzaForm">

<!--nff add a title at the top of the Web Page-->

  <h1>The JavaScript Pizza Parlor</h1>

<!--nff add directions to the user for the information to be entered-->

  <p>
  <h4>Step 1: Enter your name, address, and phone number:</h4>

<!--nff change the font-->

  <font face="Courier New">

<!--nff insert a text field for user to enter their name, add spaces between the title of the text box and the box itself, specify the size of the input box, and the type of input into the box as text.-->
    Name: &nbsp;&nbsp;&nbsp;<input name="customer" size="50"
    type="text"><br>

<!--nff insert a text field for user to enter their address, specify the size of the input box, and the type of input into the box as text.-->
    Address: <input name="address" size="50" type="text"><br>

<!--nff Insert a text field for user to enter their city, add spaces between the title of the text box and the box itself, specify the size of the input box, and the type of input into the box as text.-->
    City: &nbsp;&nbsp;&nbsp;<input name="city" size="15" type="text">

<!--nff Insert text fields for the user to enter their state and zip, specify the sizes of the input boxes, and specify that the text to be entered into the boxes will be in all caps for the state box. These input boxes should be on the same line as the last one.-->
    State:<select name="state">
          <option selected value="PA">PA</option>
          <option value="NJ">NJ</option>
          <option value="NY">NY</option>
          <option value="DE">DE</option>
      </select>

    Zip: <input name="zip" size="5" type="text"><br>

<!--nff Insert a text field for the user to enter their phone number, insert spaces after the title of the box, specify the size of the box, and the type of input as text.-->
    Phone: &nbsp;&nbsp;<input name="phone" size="50" type="text"><br>

<!--nff Insert a text field for the user to enter their email address, insert spaces after the title of the box, specify the size of the box, and the type of input as text.-->
    Email: &nbsp;&nbsp;<input name="email" size="50" type="text"><br>
  </font>
 </p>

 <!--nff add second step to order a pizza-->
 <p>
   <h4>Step 2: Select the size of pizza you want:</h4>
   <font face="Courier New">

<!--nff Add radio buttons to choose from four options for pizza sizes.-->
     <input name="sizes" type="radio" value="small">Small
     <input name="sizes" type="radio" value="medium">Medium
     <input name="sizes" type="radio" value="large">Large
     <input name="sizes" type="radio" value="jumbo">Jumbo<br>
   </font>
 </p>
 <p>

  <!--nff add third step to order a pizza-->

   <h4>Step 3: Select the pizza toppings you want:</h4>
   <font face="Courier New">

<!--nff Add check boxes for user to choose toppings.-->
     <input name="toppings" type="checkbox" value="pepperoni">Pepperoni
     <input name="toppings" type="checkbox" value="canadian bacon">Canadian Bacon
     <input name="toppings" type="checkbox" value="sausage">Sausage<br>
     <input name="toppings" type="checkbox" value="mushrooms">Mushrooms
     <input name="toppings" type="checkbox" value="pineapple">Pineapple
     <input name="toppings" type="checkbox" value="black olives">Black Olives<br>
     <input name="toppings" type="checkbox" value="green peppers">Green Peppers
     <input name="toppings" type="checkbox" value="extra cheese">Extra Cheese
     <input name="toppings" type="checkbox" value="none">None<br>
    </font>
   </p>

 <!--nff Add buttons for the options to submit order or clear entries. Add an onClick event to show one of the alerts entered earlier in this document when the submit button is clicked at the bottom of the Web Page. Add and onClick event to clear the entries in this form upon clicking the clear entries button.-->
   <input type="button" value="Submit Order" onClick="doSubmit()">
   <input type="button" value="Clear Entries" onClick="doClear()">
  </form>
</body>

</html>

最佳答案

您可以使用正则表达式，例如:

function correctFormat(customer){
    return customer.replace(/\b(.)(.*?)\b/g, function(){
        return arguments[1].toUpperCase() + arguments[2].toLowerCase();
    });
}

关于javascript - 如何在每个单词的首字母大写的情况下打印用户输入？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30633749/

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