One requirement for a directive template is that it must contain only a single root element, especially when using the restrict option to E

I am currently managing an older AngularJS application (v1.3.8).

Why is the demo application showing me this error?

The directive 'handleTable' template must have only one root element.

sandbox.html

<!DOCTYPE html>
<html>

<head>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.8/angular.js"></script>
<script src="sandbox.js"></script>
</head>

<body ng-app="myApp">
    <handle-table></handle-table>
</body>

</html>

sandbox.js

var app = angular.module("myApp", []);

app.directive('handleTable', function() {
    return {
        restrict: 'E',
        replace: true,
        template: 'hello world'
    };
});

A bug has been reported here : Template must have exactly one root element with custom directive replace: true However, it seems to be specifically related to the table/tr/td elements.

Answer №1

When utilizing replace = true, it is crucial that your template consists of just one top level element as the error indicated.

The angular directive template you are using contains the text "hello world", which is not a valid HTML element and is therefore considered an invalid root element.

To resolve this issue, consider enclosing the text within a span or div:

app.directive('handleTable', function() {
    return {
        restrict: 'E',
        replace: true,
        template: '<span>hello world</span>'
    };
});

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