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将当前数据变换(Data Transform)流中的片面数据打印到控制台,用于开发者调试数据处理过程。

开始使用

const data = [
{ a: 1, b: 2, c: 3 },
{ a: 4, b: 5, c: 6 },
];
{
"data": {
"value": data,
"transform": [ { type: 'slice', start: 1 }, { type: 'log' }, { type: 'filter', callback: (d) => d.a < 3 }, ]
}
}

上述 log 加入之后,会打印出经过 slice 处理之后的数据,并且这个数据会作为下一个 transform filter 的输入。