highs-js API reference
    Preparing search index...

    Interface HighsConstants

    Numeric native constants grouped by domain; objects are immutable.

    interface HighsConstants {
        basisStatus: Readonly<
            { basic: 1; lower: 0; nonbasic: 4; upper: 2; zero: 3 },
        >;
        basisValidity: Readonly<{ invalid: 0; valid: 1 }>;
        callbackType: Readonly<
            {
                ipmInterrupt: 2;
                logging: 0;
                mipCutPool: 7;
                mipImprovingSolution: 4;
                mipInterrupt: 6;
                mipLogging: 5;
                mipSolution: 3;
                mipUserSolution: 9;
                simplexInterrupt: 1;
            },
        >;
        hessianFormat: Readonly<{ square: 2; triangular: 1 }>;
        iis: Readonly<
            {
                boundBoxed: 4;
                boundFree: 1;
                boundLower: 2;
                boundUpper: 3;
                inConflict: 1;
                maybeInConflict: 0;
                notInConflict: -1;
                strategyColPriority: 14;
                strategyLight: 0;
                strategyRowPriority: 6;
            },
        >;
        infoType: Readonly<{ double: 2; int64: -1; integer: 1 }>;
        matrixFormat: Readonly<{ columnWise: 1; rowWise: 2 }>;
        modelStatus: Readonly<
            {
                empty: 6;
                infeasible: 8;
                interrupted: 17;
                iterationLimit: 14;
                loadError: 1;
                modelError: 2;
                notSet: 0;
                objectiveBound: 11;
                objectiveTarget: 12;
                optimal: 7;
                postsolveError: 5;
                presolveError: 3;
                solutionLimit: 16;
                solveError: 4;
                timeLimit: 13;
                unbounded: 10;
                unboundedOrInfeasible: 9;
                unknown: 15;
            },
        >;
        objectiveSense: Readonly<
            { maximize: ObjectiveSense; minimize: ObjectiveSense },
        >;
        optionType: Readonly<{ boolean: 0; double: 2; integer: 1; string: 3 }>;
        presolveStatus: Readonly<
            {
                infeasible: 1;
                notPresolved: -1;
                notReduced: 0;
                nullError: 6;
                optionsError: 7;
                outOfMemory: 8;
                reduced: 3;
                reducedToEmpty: 4;
                timeout: 5;
                unboundedOrInfeasible: 2;
            },
        >;
        solutionStatus: Readonly<{ feasible: 2; infeasible: 1; none: 0 }>;
        status: Readonly<{ error: -1; ok: 0; warning: 1 }>;
        variableType: Readonly<
            {
                continuous: 0;
                implicitInteger: 4;
                integer: 1;
                semiContinuous: 2;
                semiInteger: 3;
            },
        >;
    }
    Index
    basisStatus basisValidity callbackType hessianFormat iis infoType matrixFormat modelStatus objectiveSense optionType presolveStatus solutionStatus status variableType
    basisStatus: Readonly<{ basic: 1; lower: 0; nonbasic: 4; upper: 2; zero: 3 }>

    Column/row basis status codes.

    basisValidity: Readonly<{ invalid: 0; valid: 1 }>

    Basis validity codes.

    callbackType: Readonly<
        {
            ipmInterrupt: 2;
            logging: 0;
            mipCutPool: 7;
            mipImprovingSolution: 4;
            mipInterrupt: 6;
            mipLogging: 5;
            mipSolution: 3;
            mipUserSolution: 9;
            simplexInterrupt: 1;
        },
    >

    Callback channel identifiers exposed by this wrapper. Native type 8 (define MIP lazy constraints) exists but is intentionally excluded.

    hessianFormat: Readonly<{ square: 2; triangular: 1 }>

    Native numeric Hessian codes; high-level inputs use "triangular"/"square".

    iis: Readonly<
        {
            boundBoxed: 4;
            boundFree: 1;
            boundLower: 2;
            boundUpper: 3;
            inConflict: 1;
            maybeInConflict: 0;
            notInConflict: -1;
            strategyColPriority: 14;
            strategyLight: 0;
            strategyRowPriority: 6;
        },
    >

    IIS strategy, bound classification, and conflict-membership encodings.

    infoType: Readonly<{ double: 2; int64: -1; integer: 1 }>

    Native information-value type codes; int64 is returned as bigint.

    matrixFormat: Readonly<{ columnWise: 1; rowWise: 2 }>

    Native numeric matrix codes; high-level matrix inputs instead use "csc"/"csr".

    modelStatus: Readonly<
        {
            empty: 6;
            infeasible: 8;
            interrupted: 17;
            iterationLimit: 14;
            loadError: 1;
            modelError: 2;
            notSet: 0;
            objectiveBound: 11;
            objectiveTarget: 12;
            optimal: 7;
            postsolveError: 5;
            presolveError: 3;
            solutionLimit: 16;
            solveError: 4;
            timeLimit: 13;
            unbounded: 10;
            unboundedOrInfeasible: 9;
            unknown: 15;
        },
    >

    Detailed model state after load, presolve, or solve.

    objectiveSense: Readonly<{ maximize: ObjectiveSense; minimize: ObjectiveSense }>

    Branded objective senses, avoiding ambiguous raw numeric literals.

    optionType: Readonly<{ boolean: 0; double: 2; integer: 1; string: 3 }>

    Native option-value type codes.

    presolveStatus: Readonly<
        {
            infeasible: 1;
            notPresolved: -1;
            notReduced: 0;
            nullError: 6;
            optionsError: 7;
            outOfMemory: 8;
            reduced: 3;
            reducedToEmpty: 4;
            timeout: 5;
            unboundedOrInfeasible: 2;
        },
    >

    Result codes produced by presolve.

    solutionStatus: Readonly<{ feasible: 2; infeasible: 1; none: 0 }>

    Availability/feasibility codes for primal and dual solutions.

    status: Readonly<{ error: -1; ok: 0; warning: 1 }>

    Native call status codes.

    variableType: Readonly<
        {
            continuous: 0;
            implicitInteger: 4;
            integer: 1;
            semiContinuous: 2;
            semiInteger: 3;
        },
    >

    Column-domain encodings for continuous, integer, semi, and implicit integer variables.

    Settings
    Member Visibility

    On This Page
    Properties