Is there a way to automatically expand all nodes with children when the page loads in an Angular tree control? The tree control is full of useful features, but this specific functionality seems to be missing. It does have a property for expanded nodes. Do we need to manually identify the nodes with children and pass them to the expanded nodes property, or is there a built-in feature that I am overlooking? Any assistance would be greatly appreciated.
If you want to display expanded nodes, you need to set up a list of default node objects and assign it to the expanded-nodes attribute in your HTML code.
Here's an example of how you can achieve this using a controller script:
$scope.treeNodes = [{
label: "Categories",
children: [{
label: "Food",
children: []
}]
}, {
label: "Products",
children: [{
label: "Electronics",
children: []
}]
}];
$scope.expandedNodes = [vm.treeNodes[0], vm.treeNodes[1]];
And here's how you can implement it in your HTML element:
<treecontrol class="tree-classic" tree-model="treeNodes" expanded-nodes="expandedNodes">
{{node.label}}
</treecontrol>
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