score:1
i knew this looked familiar. sorry my last answer didn't fix all your issues.
your current problem is here;
public boolean testlogin(@requestparam string login) {
should be
public boolean testlogin(@requestbody string login) {
edit:: second problem.
your handlechange
function isn't taking in any values! it should look more like this;
handlechange(value) {
this.setstate({login: value});
}
when your input field calls this function, it needs to pass a value from the input into the state. your current code is essentially the same as this;
this.state.login = this.state.login;
which obviously isn't going to get you anywhere.
try that change. if it still does not work, be sure you open your dev-tools in your browser and step through the code line by line to be sure it is executing and storing the values you want it to.
Source: stackoverflow.com
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