Question

我有一个带有解释性文字的复选框：

<%= f.label :is_company do %>
  <%= f.check_box :is_company %>&nbsp;&nbsp; <span>Are you Representing a Company / Organization ?</span>
<% end %>

我需要将文本（如果已触发复选框）从Are you Representing a Company / Organization ?更改为I'm representing a Company / Organization !

任何人都可以帮助我吗？

HTML输出：

<label for="user_is_company">
  <input name="user[is_company]" type="hidden" value="0">
  <input id="user_is_company" name="user[is_company]" type="checkbox" value="1">&nbsp;&nbsp; 
  <span>Are you Representing a Company / Organization ?</span>
</label>

我在 coffeescript

工作

所以我憎恶这个：

$(document).on "ready page:load", ->
  check = ->
    if input.checked
      document.getElementById("label_cmp").innerHTML = "I am representing a Company / Organization !"
    else
      document.getElementById("label_cmp").innerHTML = "Are you representing a Company / Organization ?"
  input = document.querySelector("input[type=checkbox]")
  input.onchange = check
  check()

但我觉得它的代码很多，一无所有......

Answer 1

像这样的东西应该工作。如果没有，请进行游戏和调整，如果仍有问题，请回来。

$(document).on "ready page:load", ->
  $("input#user_is_company").on 'change', ->
    if $(this).is(":checked")
      $("#label_cmp").text("I'm representing a Company / Organization !")
    else
      $("#label_cmp").text("Are you Representing a Company / Organization ?")

注意：使用jQuery toggle可能有更短的方法，但我对JS的了解有限。

Answer 2

$ ->
  $("#user_is_company").on 'change', ->
      $("#label_cmp").text if $(this).is(":checked") then "I am representing a Company / Organization !" else "Are you representing a Company / Organization ?"

编译为......

$(function() {
  return $("#user_is_company").on('change', function() {
    return $("#label_cmp").text($(this).is(":checked") ? "I am representing a Company / Organization !" : "Are you representing a Company / Organization ?");
  });
});

演示：http://jsfiddle.net/VcFCL/

关于我的代码选择的一些评论...

# jquery shorthand form for on-ready wrapper function
# ensures DOM is loaded before executing inner function
$ ->
  # identify elements by ID alone, as ID should be unique on the page
  # listen for `change` event on selected element, and run callback
  $("#user_is_company").on 'change', ->
    # set the text of the label conditionally by the `checked` status of the selected element
    $("#label_cmp").text if $(this).is(":checked") then "I am representing a Company / Organization !" else "Are you representing a Company / Organization ?"

如果选中则更改文本 - 复选框

2 个答案: