Ich bin neu zu Reagieren, und ich versuche React auf meinem Angular Project zu binden. Derzeit habe ich einige Komponenten, die ich nur Kinderelemente binden muss. Aber ich bekomme diesen Fehler: Invariant Violation: GRID.render(): A valid React element (or null) must be returned. You may have returned undefined, an array or some other invalid object.
Reagieren nicht untergeordneten Elemente
Mein React Code ist hier.
var GRID = React.createClass({
displayName: 'GRID',
render: function() {
var grid = this.props.grid;
var x = 5; //minutes interval
var timeSheet = []; // time array
var tt = 0; // start time
var ap = ['AM', 'PM']; // AM-PM
var options = [];
var key = 0;
//loop to increment the time and push results in array
for (var i = 0; tt < 24 * 60; i++) {
var hh = Math.floor(tt/60); // getting hours of day in 0-24 format
var mm = (tt % 60); // getting minutes of the hour in 0-55 format
// timeSheet[i] = ("0" + (hh % 12)).slice(-2) + ':' + ("0" + mm).slice(-2) + ap[Math.floor(hh/12)]; // pushing data in array in [00:00 - 12:00 AM/PM format]
tt = tt + x;
key += 1;
var time = {
"key": key,
"lable": ("0" + (hh % 12)).slice(-2) + ':' + ("0" + mm).slice(-2) + " " + ap[Math.floor(hh/12)],
"value": ("0" + (hh)).slice(-2) + ':' + ("0" + mm).slice(-2)
}
timeSheet.push(time)
}
var select = React.createElement('select',
timeSheet.map(function (time, index) {
var option = React.createElement('option', { value: time.value, key: index, label: time.lable, className: 'md-option' });
return option;
})
)
return React.Children.map(select.props.children, (element, idx) => {
console.log(element);
return React.cloneElement(element, { ref: idx });
})
}
});
Was ist das Problem mit diesem Code?