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JavaScript Grid column - summary Config

Optional. Creates the list of calculated values based on the column's data

summary?: { 
    [key: string]: string | [string, string] | (row: IRow[]) => string | number 
} | string;

The defined list of calculated values is available only at the column's level. Can be initialized either as an object or as a string. As an object it contains calculated values set as key:value pairs, where the keys are the field names and values can be:

• a string with the name of the applied functor
• a tuple [string, string] that specifies the field name and the name of the applied functor
• a (rows: IRow[]) => string | number; function for calculating the summary of the column

info

Note that when the column summary property is initialized as a string, the resulting value (excluding "count") is used with applied patternMask/numberMask, if there are any.

const grid = new dhx.Grid("grid_container", {
    columns: [
        {
            id: "quantity",
            type: "number",
            header: [{ text: "Quantity" }],
            footer: [{ text: ({ sum }) => sum }],
            summary: "sum",
            numberMask: { prefix: "$" },
        },
        // more columns configuration objects
    ],
    // more options
});

Related article: Custom statistics in the column header/footer and spans

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