Question

我默认禁用了一个文本框，我想在下拉的onchange（）事件中启用它。

我试过这个但没有工作：

service_account_mail = 'xxxxxx@developer.gserviceaccount.com'
service_account_client_id = 'xxxxxx.apps.googleusercontent.com'

with open("private_key.p12") as f:
    private_key = f.read()

gapps_scope=[
    'https://www.googleapis.com/auth/drive',
    'https://apps-apis.google.com/a/feeds/emailsettings/2.0/',
]

credentials = SignedJwtAssertionCredentials(service_account_mail, private_key, gapps_scope)

print credentials.access_token
None

credentials.get_access_token()

credentials.access_token
Now I get something useful

headers = {
    'Authorization': 'Bearer ' + credentials.access_token,
    'Content-type': 'application/atom+xml'
}

url_tpl = """https://apps-apis.google.com/a/feeds/emailsettings/2.0/mydomain.com/%s/%s"""

url = url_tpl % (myusername, 'label')
r = requests.get(url, headers=headers)
403 - 'You are not authorized to access this API.'

body_tpl = """<?xml version="1.0" encoding="utf-8"?>
<atom:entry xmlns:atom="http://www.w3.org/2005/Atom" xmlns:apps="http://schemas.google.com/apps/2006">
    <apps:property name="signature" value="%s" />
</atom:entry>"""

url = url_tpl % (myusername, 'signature')

payload = body_tpl % 'Test'
r = requests.put(url, headers=headers, data=payload)
403 - 'You are not authorized to access this API.'

r = requests.get(url, headers=headers)
403 - 'You are not authorized to access this API.'

drive_url = "https://www.googleapis.com/drive/v2/files"
headers = {  'Authorization': 'Bearer ' + credentials.access_token, }
r = requests.get(drive_url, headers=headers)
200 - 'OK'

什么是正确的？

Answer 1

Javascript是区分大小写的语言。

代码中的问题是函数名称拼写错误

onchange="myfunction()"

并在javascript（通知大写F）

function myFunction() {

更改功能名称，然后它将起作用。

Demo

function myFunction() {
  document.getElementById("myText").disabled = false;
}

Name:
<input type="text" id="myText" disabled="true">
<p>Click the button to disable the text field.</p>
<select onchange="myFunction()">
  <option>1</option>
  <option>2</option>
  <option>3</option>
</select>

另外，使用addEventListener绑定事件。

Demo

Answer 2

JavaScript中的符号区分大小写。您已将功能命名为myFunction，但尝试使用myfunction调用它。

此外，不使用内联事件处理程序！在JavaScript部分中使用.addEventListener()，如下所示：

function enableText() {
    document.getElementById("myText").disabled = false;
}
//                     You'll need to add a class name to your select
document.querySelector('.mySelect').addEventListener('change', enableText);

function enableText() {
        document.getElementById("myText").disabled = false;
    }
    //                     You'll need to add a class name to your select
    document.querySelector('.mySelect').addEventListener('change', enableText);

Name:
    <input type="text" id="myText" disabled="true">
    <p>Click the button to disable the text field.</p>
    <select class="mySelect">
        <option>1</option>
        <option>2</option>
        <option>3</option>
    </select>

Answer 3

java脚本是区分大小写的语言，只需将函数myFunction（）更改为函数myfunction（）

即可

    function myfunction() {
        document.getElementById("myText").disabled = false;
    }

<html>

<body>
    Name:
    <input type="text" id="myText" disabled="true">
    <p>Click the button to disable the text field.</p>
    <select onchange="myfunction()">
        <option>1</option>
        <option>2</option>
        <option>3</option>
    </select>
   
</body>


</html>

如何在javascript中启用下拉值更改时启用文本框

3 个答案: