D3 Bar Charts, Lollipops, Nesting, Maps

ojs

Author

Tim Oltman

@toltman

Comments (2)

Tim Oltman

Oct 3, 2020

Currently, the API is returning is a null value for some rocket.agencies. This causes your notebook to break. You can default the length to 0 with num_agencies: row.rocket.agencies?.length || 0

Cameron Yick

Oct 5, 2020

Great find! Wasn't sure if optional chaining was used widely, but it looks safe. Thanks for fixing this! https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining

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D3 Bar Charts, Lollipops, Nesting, Maps | Tim Oltman | ObservableD3 Bar Charts, Lollipops, Nesting, Maps | Tim Oltman | Observable