document readonly
时间: 2023-07-17 18:54:38 浏览: 43
"document readonly" 是一个 JavaScript 中的属性,它用于设置文档是否为只读模式。当将该属性设置为 true 时,文档将变为只读模式,用户将无法对文档进行修改。这在某些情况下非常有用,例如当你想要保护你的文档免受意外修改时。需要注意的是,该属性只能通过 JavaScript 代码来设置,无法通过 HTML 属性来设置。
相关问题
请将下述shell语言转换为python语言:if [ $HELPs_project_directory ]; then printf "" else # because on sunway platfrom, file name contain symbolic link can not open # thus we should make sure the HELPs directory do not contain symbolic link # first obtain the script directory, this path may contain symbolic link readonly script_directory="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )" # then remove symbolic link if it exist, the absolute path now obtained readonly HELPs_script_directory=$(readlink -f ${script_directory}) readonly HELPs_project_directory=`dirname ${HELPs_script_directory}` readonly HELPs_build_directory=${HELPs_project_directory}/build readonly HELPs_document_directory=${HELPs_project_directory}/document readonly HELPs_third_party_directory=${HELPs_project_directory}/third_party readonly HELPs_output_directory=${HELPs_project_directory}/output readonly HELPs_HPC_script_directory=${HELPs_project_directory}/HPC_script fi
以下是将上述Shell代码转换为Python代码的示例:
```python
import os
if os.environ.get('HELPs_project_directory'):
print("")
else:
# because on sunway platfrom, file name contain symbolic link can not open
# thus we should make sure the HELPs directory do not contain symbolic link
# first obtain the script directory, this path may contain symbolic link
script_directory = os.path.dirname(os.path.realpath(__file__))
# then remove symbolic link if it exist, the absolute path now obtained
HELPs_script_directory = os.path.realpath(script_directory)
HELPs_project_directory = os.path.dirname(HELPs_script_directory)
HELPs_build_directory = os.path.join(HELPs_project_directory, 'build')
HELPs_document_directory = os.path.join(HELPs_project_directory, 'document')
HELPs_third_party_directory = os.path.join(HELPs_project_directory, 'third_party')
HELPs_output_directory = os.path.join(HELPs_project_directory, 'output')
HELPs_HPC_script_directory = os.path.join(HELPs_project_directory, 'HPC_script')
```
在上述Python代码中,我们使用`os`模块来获取路径和目录,并使用相应的函数替代Shell中的命令。通过这种方式,我们可以在Python中实现与原始Shell代码相同的逻辑。请注意,根据具体情况,你可能需要根据实际需求进行调整和修改。
如何去除readonly
要去除一个元素的 `readonly` 属性,可以使用 JavaScript 来动态修改该元素的属性。假设你想要去除一个具有 `id` 为 `myInput` 的文本输入框的 `readonly` 属性,可以使用以下代码:
```javascript
var myInput = document.getElementById('myInput');
myInput.removeAttribute('readonly');
```
这里的 `getElementById()` 方法用于获取具有指定 `id` 的元素,并将其存储在 `myInput` 变量中。然后,使用 `removeAttribute()` 方法来移除该元素的 `readonly` 属性。
注意,如果你想要在用户与输入框进行交互之前移除 `readonly` 属性,可以在 `removeAttribute()` 方法之前添加一些逻辑来判断何时移除属性。例如,你可以在用户单击一个按钮时移除 `readonly` 属性,或者在某个条件得到满足时移除属性。
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