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12 changes: 6 additions & 6 deletions src/datascience-ui/interactive-common/cellOutput.tsx
Original file line number Diff line number Diff line change
Expand Up @@ -351,9 +351,9 @@ export class CellOutput extends React.Component<ICellOutputProps> {

private renderOutput = (outputs: nbformat.IOutput[]): JSX.Element => {
const buffer: JSX.Element[] = [];
const transformedList = outputs.map(this.transformOutput);
const transformedList = outputs.map(this.transformOutput.bind(this));

transformedList.forEach(transformed => {
transformedList.forEach((transformed, index) => {
let mimetype = transformed.mimeType;

// If that worked, use the transform
Expand All @@ -367,7 +367,7 @@ export class CellOutput extends React.Component<ICellOutputProps> {
// If we are not theming plots then wrap them in a white span
if (transformed.outputSpanClassName) {
buffer.push(
<div role='group' onDoubleClick={transformed.doubleClick} onClick={this.click} className={className}>
<div role='group' key={index} onDoubleClick={transformed.doubleClick} onClick={this.click} className={className}>
<span className={transformed.outputSpanClassName}>
{transformed.extraButton}
<Transform data={transformed.data} />
Expand All @@ -376,7 +376,7 @@ export class CellOutput extends React.Component<ICellOutputProps> {
);
} else {
buffer.push(
<div role='group' onDoubleClick={transformed.doubleClick} onClick={this.click} className={className}>
<div role='group' key={index} onDoubleClick={transformed.doubleClick} onClick={this.click} className={className}>
{transformed.extraButton}
<Transform data={transformed.data} />
</div>
Expand All @@ -390,7 +390,7 @@ export class CellOutput extends React.Component<ICellOutputProps> {
mimetype = 'unknown';
}
const str: string = this.getUnknownMimeTypeFormatString().format(mimetype);
buffer.push(<div>{str}</div>);
buffer.push(<div key={index}>{str}</div>);
}
});

Expand All @@ -404,6 +404,6 @@ export class CellOutput extends React.Component<ICellOutputProps> {
style.maxHeight = `${this.props.maxTextSize}px`;
}

return <div style={style}>{buffer}</div>;
return <div key={0} style={style}>{buffer}</div>;
}
}