我想禁用所有符号输入到与以下内容无关的输入字段:字母或数字或空格或符号符号或句号。
E.g。 允许:允许A-Z,a-z,0-9,& ,.和空格。
不允许:其他所有字符,例如! @#$%^ *() - + = []; :' " < > ,/? | =`〜等等。
<input id="ItemName" type="text" />
答案 0 :(得分:1)
您可以注册一个按键事件处理程序,如果您不“喜欢”新输入,则返回false:
$('#ItemName').keypress(function (e) {
var txt = String.fromCharCode(e.which);
if (!txt.match(/[A-Za-z0-9&. ]/)) {
return false;
}
});
JSFiddle:https://www.npmjs.com/package/dynamodb-marshaler
请注意,此解决方案需要JQuery
答案 1 :(得分:0)
正确的方法是使用“输入”事件。
document.addEventListener('input', script);
https://developer.mozilla.org/en-US/docs/Web/Events/input
答案 2 :(得分:0)
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
self.searchResults = [] //this might be causing the crash
print("searchText \(searchText)")
let searchRequest = MKLocalSearch.Request()
searchRequest.naturalLanguageQuery = searchText
let search = MKLocalSearch(request: searchRequest)
search.start { response, error in
guard let response = response else {
print("Error: \(error?.localizedDescription ?? "Unknown error").")
return
}
for item in response.mapItems {
self.searchResults.append(item.placemark)
self.tableView.reloadData()
}
}
}
}
//MARK: TableView
extension LocationSearchViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return searchResults.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "ResultCell", for: indexPath)
let listItem = searchResults[indexPath.row]
cell.textLabel?.text = listItem.name
cell.detailTextLabel?.text = listItem.administrativeArea ?? ""
return cell
}
}
extension LocationSearchViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("selected a row")
let local = searchResults[indexPath.row]
// pass local back
if let delegate = delegate{
delegate.doSomethingWith(data: local)
}
dismiss(animated: true, completion: nil)
}
}
答案 3 :(得分:0)
是的,是的,我知道。这个问题太老了。但我只是尝试一下(没有jQuery)
HTML
<input type="text" placeholder="Try to put a non-alphabetical character here! (you can put a number and a space too)" id="nochars" />
JS
const input = document.getElementById("nochars"); // gets the element (the input) by it's id
input.addEventListener("input", (event) => {
const char = String.fromCharCode(event.keyCode)); // changes the keycode from a int to a string
if (!(/[a-zA-Z0-9\s\.$]/.test(char))) {
event.preventDefault(); // prevents the default (which is adding the character to the value)
}
});
还要检查EventTarget.addEventListener
does。 (\s
是空格-一个空格)