Question

我使用CasperJS，我希望点击具有特定长度字符串的元素（ span ）。例如，我想点击跨度，长度为5个字符。

Array
(
    [0] => Array
        (
            [0] => {amdnia91(+wowa}
            [1] => 
.something{property:value;prop2:value}
            [2] => #something2{someprop:val;prop:val}
            [3] => #something2{someprop:val;prop:val}
            [4] => #something2{someprop:val;prop:val}
        )

    [1] => Array
        (
            [0] => amdnia91(+wowa
            [1] => property:value;prop2:value
            [2] => someprop:val;prop:val
            [3] => someprop:val;prop:val
            [4] => someprop:val;prop:val
        )

)

有什么办法吗？

Answer 1

如果要根据内容长度单击元素，则有多种方法可以实现此目的。 XPath使用public class RelayCommand<T> : ICommand { #region Fields private readonly Action<T> _execute = null; private readonly Predicate<T> _canExecute = null; #endregion #region Constructors /// <summary> /// Creates a new command that can always execute. /// </summary> /// <param name="execute">The execution logic.</param> public RelayCommand(Action<T> execute) : this(execute, null) { } /// <summary> /// Creates a new command with conditional execution. /// </summary> /// <param name="execute">The execution logic.</param> /// <param name="canExecute">The execution status logic.</param> public RelayCommand(Action<T> execute, Predicate<T> canExecute) { if (execute == null) throw new ArgumentNullException("execute"); _execute = execute; _canExecute = canExecute; } #endregion #region ICommand Members public bool CanExecute(object parameter) { return _canExecute == null ? true : _canExecute((T)parameter); } public event EventHandler CanExecuteChanged; public void RaiseCanExecuteChanged() { var handler = CanExecuteChanged; if (handler != null) CanExecuteChanged(this, new EventArgs()); } public void Execute(object parameter) { _execute((T)parameter); } #endregion }函数提供了最简单的方法。

如果元素的其中一个文本节点具有特定长度string-length(string)：
```
y
```
如果所有内容都需要具有一定的大小（相当于之前的建议，除了单个文本节点之外没有其他节点）：
```
casper.click(x("//span[string-length(text())=" + y + "]"));
```

如果空格是个问题，那么你应该删除它：

casper.click(x("//span[string-length(.)=" + y + "]"));

XPath助手通过casper.click(x("//span[string-length(normalize-space(text()))=" + y + "]")); casper.click(x("//span[string-length(normalize-space(.))=" + y + "]"));提供。

如何在CasperJS中点击具有特定字符串长度的元素？

1 个答案: