函数调用在我的页面中不起作用

时间：2012-12-08 04:56:52

标签： javascript html json google-font-api

我制作了一个与google-font-Api配合使用的选择菜单。我在JSBIN中运行的是我的工作http://jsbin.com/ocutuk/18/

但是当我在html页面中复制我的代码时，它甚至没有在页面中加载字体名称。我试图让它发挥作用，但它仍处于死胡同。这是我的HTML代码

 <!DOCTYPE html>
 <html>
 <head>
  <script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"> </script>
  <meta charset=utf-8 />
  <title>FONT API</title>
  <script>
    function SetFonts(fonts) { 
    for (var i = 0; i < fonts.items.length; i++) {      
    $('#styleFont')
     .append($("<option></option>")
     .attr("value", fonts.items[i].family)
     .text(fonts.items[i].family));
    }    
  }

  var script = document.createElement('script');
  script.src = 'https://www.googleapis.com/webfonts/v1/webfonts?key=AIzaSyB8Ua6XIfe-gqbkE8P3XL4spd0x8Ft7eWo&callback=SetFonts';
  document.body.appendChild(script);


  WebFontConfig = {
google: { families: ['ABeeZee', 'Abel', 'Abril Fatface', 'Aclonica', 'Acme', 'Actor', 'Adamina', 'Advent Pro', 'Aguafina Script', 'Akronim', 'Aladin', 'Aldrich', 'Alegreya', 'Alegreya SC', 'Alex Brush', 'Alfa Slab One', 'Alice', 'Alike', 'Alike Angular', 'Allan', 'Allerta', 'Allerta Stencil', 'Allura', 'Almendra', 'Almendra Display', 'Almendra SC', 'Amarante', 'Amaranth', 'Amatic SC', 'Amethysta', 'Anaheim', 'Andada', 'Andika', 'Angkor', 'Annie Use Your Telescope', 'Anonymous Pro', 'Antic', 'Antic Didone', 'Antic Slab', 'Anton', 'Arapey', 'Arbutus', 'Arbutus Slab', 'Architects Daughter', 'Archivo Black', 'Archivo Narrow', 'Arimo', 'Arizonia', 'Armata', 'Artifika', 'Arvo', 'Asap', 'Asset', 'Astloch', 'Asul', 'Atomic Age', 'Aubrey', 'Audiowide', 'Autour One', 'Average', 'Average Sans', 'Averia Gruesa Libre', 'Averia Libre', 'Averia Sans Libre', 'Averia Serif Libre', 'Bad Script', 'Balthazar', 'Bangers', 'Basic', 'Battambang', 'Baumans', 'Bayon', 'Belgrano', 'Belleza', 'BenchNine', 'Bentham', 'Berkshire Swash', 'Bevan', 'Bigelow Rules', 'Bigshot One', 'Bilbo', 'Bilbo Swash Caps', 'Bitter', 'Black Ops One', 'Bokor', 'Bonbon', 'Boogaloo', 'Bowlby One', 'Bowlby One SC', 'Brawler', 'Bree Serif', 'Bubblegum Sans', 'Bubbler One', 'Buda', 'Buenard', 'Butcherman', 'Butterfly Kids', 'Cabin', 'Cabin Condensed', 'Cabin Sketch', 'Caesar Dressing', 'Cagliostro', 'Calligraffitti', 'Cambo', 'Candal', 'Cantarell', 'Cantata One', 'Cantora One', 'Capriola', 'Cardo', 'Carme', 'Carrois Gothic', 'Carrois Gothic SC', 'Carter One', 'Caudex', 'Cedarville Cursive', 'Ceviche One', 'Changa One', 'Chango', 'Chau Philomene One', 'Chela One', 'Chelsea Market', 'Chenla', 'Cherry Cream Soda', 'Cherry Swash', 'Chewy', 'Chicle', 'Chivo', 'Cinzel', 'Cinzel Decorative', 'Clicker Script', 'Coda', 'Coda Caption', 'Codystar', 'Combo', 'Comfortaa', 'Coming Soon', 'Concert One', 'Condiment', 'Content', 'Contrail One', 'Convergence', 'Cookie', 'Copse', 'Corben', 'Courgette', 'Cousine', 'Coustard', 'Covered By Your Grace', 'Crafty Girls', 'Creepster', 'Crete Round', 'Crimson Text', 'Croissant One', 'Crushed', 'Cuprum', 'Cutive', 'Cutive Mono']}
};
(function() {
var wf = document.createElement('script');
wf.src = ('https:' == document.location.protocol ? 'https' : 'http') +
  '://ajax.googleapis.com/ajax/libs/webfont/1/webfont.js';
wf.type = 'text/javascript';
wf.async = 'true';
var s = document.getElementsByTagName('script')[0];
s.parentNode.insertBefore(wf, s);
})();


 $("#styleFont").change(function (){
   var id =$('#styleFont option' +':selected').val();  
                            $("#custom_text").css('font-family',id);

   });


  </script>
  <style>
      #custom_text {
  font-family: Arial;
  resize: none;
  margin-top: 20px;
  width: 500px;
     }
      #styleFont {
  width: 100px;
     }
    </style>

    </head>
    <body>
    <select id="styleFont">
    </select><br>
    <textarea id="custom_text"></textarea>
    </body>
    </html>

我怎样才能让它发挥作用。我在这里犯的错误是什么。

2 个答案:

答案 0 :(得分：2)

将脚本移动到页面底部。现在的问题是脚本在DOM形成之前就已经运行了。

<!DOCTYPE html>
 <html>
 <head>
  <script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"> </script>
  <meta charset=utf-8 />
  <title>FONT API</title>

  <style>
      #custom_text {
  font-family: Arial;
  resize: none;
  margin-top: 20px;
  width: 500px;
     }
      #styleFont {
  width: 100px;
     }
    </style>

    </head>
    <body>
    <select id="styleFont">
    </select><br>
    <textarea id="custom_text"></textarea>

    <script>
    function SetFonts(fonts) { 
    for (var i = 0; i < fonts.items.length; i++) {      
    $('#styleFont')
     .append($("<option></option>")
     .attr("value", fonts.items[i].family)
     .text(fonts.items[i].family));
    }    
  }

  var script = document.createElement('script');
  script.src = 'https://www.googleapis.com/webfonts/v1/webfonts?key=AIzaSyB8Ua6XIfe-gqbkE8P3XL4spd0x8Ft7eWo&callback=SetFonts';
  document.body.appendChild(script);


  WebFontConfig = {
google: { families: ['ABeeZee', 'Abel', 'Abril Fatface', 'Aclonica', 'Acme', 'Actor', 'Adamina', 'Advent Pro', 'Aguafina Script', 'Akronim', 'Aladin', 'Aldrich', 'Alegreya', 'Alegreya SC', 'Alex Brush', 'Alfa Slab One', 'Alice', 'Alike', 'Alike Angular', 'Allan', 'Allerta', 'Allerta Stencil', 'Allura', 'Almendra', 'Almendra Display', 'Almendra SC', 'Amarante', 'Amaranth', 'Amatic SC', 'Amethysta', 'Anaheim', 'Andada', 'Andika', 'Angkor', 'Annie Use Your Telescope', 'Anonymous Pro', 'Antic', 'Antic Didone', 'Antic Slab', 'Anton', 'Arapey', 'Arbutus', 'Arbutus Slab', 'Architects Daughter', 'Archivo Black', 'Archivo Narrow', 'Arimo', 'Arizonia', 'Armata', 'Artifika', 'Arvo', 'Asap', 'Asset', 'Astloch', 'Asul', 'Atomic Age', 'Aubrey', 'Audiowide', 'Autour One', 'Average', 'Average Sans', 'Averia Gruesa Libre', 'Averia Libre', 'Averia Sans Libre', 'Averia Serif Libre', 'Bad Script', 'Balthazar', 'Bangers', 'Basic', 'Battambang', 'Baumans', 'Bayon', 'Belgrano', 'Belleza', 'BenchNine', 'Bentham', 'Berkshire Swash', 'Bevan', 'Bigelow Rules', 'Bigshot One', 'Bilbo', 'Bilbo Swash Caps', 'Bitter', 'Black Ops One', 'Bokor', 'Bonbon', 'Boogaloo', 'Bowlby One', 'Bowlby One SC', 'Brawler', 'Bree Serif', 'Bubblegum Sans', 'Bubbler One', 'Buda', 'Buenard', 'Butcherman', 'Butterfly Kids', 'Cabin', 'Cabin Condensed', 'Cabin Sketch', 'Caesar Dressing', 'Cagliostro', 'Calligraffitti', 'Cambo', 'Candal', 'Cantarell', 'Cantata One', 'Cantora One', 'Capriola', 'Cardo', 'Carme', 'Carrois Gothic', 'Carrois Gothic SC', 'Carter One', 'Caudex', 'Cedarville Cursive', 'Ceviche One', 'Changa One', 'Chango', 'Chau Philomene One', 'Chela One', 'Chelsea Market', 'Chenla', 'Cherry Cream Soda', 'Cherry Swash', 'Chewy', 'Chicle', 'Chivo', 'Cinzel', 'Cinzel Decorative', 'Clicker Script', 'Coda', 'Coda Caption', 'Codystar', 'Combo', 'Comfortaa', 'Coming Soon', 'Concert One', 'Condiment', 'Content', 'Contrail One', 'Convergence', 'Cookie', 'Copse', 'Corben', 'Courgette', 'Cousine', 'Coustard', 'Covered By Your Grace', 'Crafty Girls', 'Creepster', 'Crete Round', 'Crimson Text', 'Croissant One', 'Crushed', 'Cuprum', 'Cutive', 'Cutive Mono']}
};
(function() {
var wf = document.createElement('script');
wf.src = ('https:' == document.location.protocol ? 'https' : 'http') +
  '://ajax.googleapis.com/ajax/libs/webfont/1/webfont.js';
wf.type = 'text/javascript';
wf.async = 'true';
var s = document.getElementsByTagName('script')[0];
s.parentNode.insertBefore(wf, s);
})();


 $("#styleFont").change(function (){
   var id =$('#styleFont option' +':selected').val();  
                            $("#custom_text").css('font-family',id);

   });


  </script>
    </body>
    </html>

答案 1 :(得分：0)

嗯，原因很简单：

你试图在完全加载之前操纵一些DOM元素。

将代码包装在

中 
$(function(){
}

可以解决问题。

更具体地说，您可以将代码更改为：

  function SetFonts(fonts) {
  for (var i = 0; i < fonts.items.length; i++) {
  $('#styleFont')
   .append($("<option></option>")
   .attr("value", fonts.items[i].family)
   .text(fonts.items[i].family));
  }
}

$(function(){
var script = document.createElement('script');
script.src = 'https://www.googleapis.com/webfonts/v1/webfonts?key=AIzaSyB8Ua6XIfe-gqbkE8P3XL4spd0x8Ft7eWo&callback=SetFonts';
document.body.appendChild(script);

 // all the rest of your code....
});
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