Added missing strict type checking options to grafana/ui and fixed type errors

packages/grafana-ui/src/components/Graph/Graph.tsx

@@ -22,7 +22,7 @@ export class Graph extends PureComponent<GraphProps> {
     showBars: false,
   };
 
-  element: HTMLElement | null;
+  element: HTMLElement | null = null;
 
   componentDidUpdate() {
     this.draw();

packages/grafana-ui/src/themes/index.ts

@@ -6,7 +6,7 @@ let themeMock: ((name?: string) => GrafanaTheme) | null;
 
 export let getTheme = (name?: string) => (themeMock && themeMock(name)) || (name === 'light' ? lightTheme : darkTheme);
 
-export const mockTheme = (mock: (name: string) => GrafanaTheme) => {
+export const mockTheme = (mock: (name?: string) => GrafanaTheme) => {
   themeMock = mock;
   return () => {
     themeMock = null;

packages/grafana-ui/src/utils/valueFormats/arithmeticFormatters.ts

-import { toFixed } from './valueFormats';
+import { toFixed, DecimalCount } from './valueFormats';
 
-export function toPercent(size: number, decimals: number) {
+export function toPercent(size: number, decimals: DecimalCount) {
   if (size === null) {
     return '';
   }
   return toFixed(size, decimals) + '%';
 }
 
-export function toPercentUnit(size: number, decimals: number) {
+export function toPercentUnit(size: number, decimals: DecimalCount) {
   if (size === null) {
     return '';
   }
   return toFixed(100 * size, decimals) + '%';
 }
 
-export function toHex0x(value: number, decimals: number) {
+export function toHex0x(value: number, decimals: DecimalCount) {
   if (value == null) {
     return '';
   }
@@ -25,7 +25,7 @@ export function toHex0x(value: number, decimals: number) {
   return '0x' + hexString;
 }
 
-export function toHex(value: number, decimals: number) {
+export function toHex(value: number, decimals: DecimalCount) {
   if (value == null) {
     return '';
   }
@@ -34,9 +34,9 @@ export function toHex(value: number, decimals: number) {
     .toUpperCase();
 }
 
-export function sci(value: number, decimals: number) {
+export function sci(value: number, decimals: DecimalCount) {
   if (value == null) {
     return '';
   }
-  return value.toExponential(decimals);
+  return value.toExponential(decimals as number);
 }

packages/grafana-ui/src/utils/valueFormats/dateTimeFormatters.ts

-import { toFixed, toFixedScaled } from './valueFormats';
+import { toFixed, toFixedScaled, DecimalCount } from './valueFormats';
 import moment from 'moment';
 
 interface IntervalsInSeconds {
@@ -27,7 +27,7 @@ const INTERVALS_IN_SECONDS: IntervalsInSeconds = {
   [Interval.Millisecond]: 0.001,
 };
 
-export function toNanoSeconds(size: number, decimals: number, scaledDecimals: number) {
+export function toNanoSeconds(size: number, decimals?: DecimalCount, scaledDecimals?: DecimalCount) {
   if (size === null) {
     return '';
   }
@@ -45,7 +45,7 @@ export function toNanoSeconds(size: number, decimals: number, scaledDecimals: nu
   }
 }
 
-export function toMicroSeconds(size: number, decimals: number, scaledDecimals: number) {
+export function toMicroSeconds(size: number, decimals?: DecimalCount, scaledDecimals?: DecimalCount) {
   if (size === null) {
     return '';
   }
@@ -59,7 +59,7 @@ export function toMicroSeconds(size: number, decimals: number, scaledDecimals: n
   }
 }
 
-export function toMilliSeconds(size: number, decimals: number, scaledDecimals: number) {
+export function toMilliSeconds(size: number, decimals?: DecimalCount, scaledDecimals?: DecimalCount) {
   if (size === null) {
     return '';
   }
@@ -83,22 +83,29 @@ export function toMilliSeconds(size: number, decimals: number, scaledDecimals: n
   return toFixedScaled(size / 31536000000, decimals, scaledDecimals, 10, ' year');
 }
 
-export function toSeconds(size: number, decimals: number, scaledDecimals: number) {
+export function trySubstract(value1: DecimalCount, value2: DecimalCount): DecimalCount {
+  if (value1 !== null && value1 !== undefined && value2 !== null && value2 !== undefined) {
+    return value1 - value2;
+  }
+  return undefined;
+}
+
+export function toSeconds(size: number, decimals?: DecimalCount, scaledDecimals?: DecimalCount) {
   if (size === null) {
     return '';
   }
 
   // Less than 1 µs, divide in ns
   if (Math.abs(size) < 0.000001) {
-    return toFixedScaled(size * 1e9, decimals, scaledDecimals - decimals, -9, ' ns');
+    return toFixedScaled(size * 1e9, decimals, trySubstract(scaledDecimals, decimals), -9, ' ns');
   }
   // Less than 1 ms, divide in µs
   if (Math.abs(size) < 0.001) {
-    return toFixedScaled(size * 1e6, decimals, scaledDecimals - decimals, -6, ' µs');
+    return toFixedScaled(size * 1e6, decimals, trySubstract(scaledDecimals, decimals), -6, ' µs');
   }
   // Less than 1 second, divide in ms
   if (Math.abs(size) < 1) {
-    return toFixedScaled(size * 1e3, decimals, scaledDecimals - decimals, -3, ' ms');
+    return toFixedScaled(size * 1e3, decimals, trySubstract(scaledDecimals, decimals), -3, ' ms');
   }
 
   if (Math.abs(size) < 60) {
@@ -120,7 +127,7 @@ export function toSeconds(size: number, decimals: number, scaledDecimals: number
   return toFixedScaled(size / 3.15569e7, decimals, scaledDecimals, 7, ' year');
 }
 
-export function toMinutes(size: number, decimals: number, scaledDecimals: number) {
+export function toMinutes(size: number, decimals?: DecimalCount, scaledDecimals?: DecimalCount) {
   if (size === null) {
     return '';
   }
@@ -138,7 +145,7 @@ export function toMinutes(size: number, decimals: number, scaledDecimals: number
   }
 }
 
-export function toHours(size: number, decimals: number, scaledDecimals: number) {
+export function toHours(size: number, decimals?: DecimalCount, scaledDecimals?: DecimalCount) {
   if (size === null) {
     return '';
   }
@@ -154,7 +161,7 @@ export function toHours(size: number, decimals: number, scaledDecimals: number)
   }
 }
 
-export function toDays(size: number, decimals: number, scaledDecimals: number) {
+export function toDays(size: number, decimals?: DecimalCount, scaledDecimals?: DecimalCount) {
   if (size === null) {
     return '';
   }
@@ -168,13 +175,15 @@ export function toDays(size: number, decimals: number, scaledDecimals: number) {
   }
 }
 
-export function toDuration(size: number, decimals: number, timeScale: Interval): string {
+export function toDuration(size: number, decimals: DecimalCount, timeScale: Interval): string {
   if (size === null) {
     return '';
   }
+
   if (size === 0) {
     return '0 ' + timeScale + 's';
   }
+
   if (size < 0) {
     return toDuration(-size, decimals, timeScale) + ' ago';
   }
@@ -189,14 +198,22 @@ export function toDuration(size: number, decimals: number, timeScale: Interval):
     { long: Interval.Second },
     { long: Interval.Millisecond },
   ];
+
   // convert $size to milliseconds
   // intervals_in_seconds uses seconds (duh), convert them to milliseconds here to minimize floating point errors
   size *= INTERVALS_IN_SECONDS[timeScale] * 1000;
 
   const strings = [];
+
   // after first value >= 1 print only $decimals more
   let decrementDecimals = false;
-  for (let i = 0; i < units.length && decimals >= 0; i++) {
+  let decimalsCount = 0;
+
+  if (decimals !== null || decimals !== undefined) {
+    decimalsCount = decimals as number;
+  }
+
+  for (let i = 0; i < units.length && decimalsCount >= 0; i++) {
     const interval = INTERVALS_IN_SECONDS[units[i].long] * 1000;
     const value = size / interval;
     if (value >= 1 || decrementDecimals) {
@@ -205,14 +222,14 @@ export function toDuration(size: number, decimals: number, timeScale: Interval):
       const unit = units[i].long + (floor !== 1 ? 's' : '');
       strings.push(floor + ' ' + unit);
       size = size % interval;
-      decimals--;
+      decimalsCount--;
     }
   }
 
   return strings.join(', ');
 }
 
-export function toClock(size: number, decimals?: number) {
+export function toClock(size: number, decimals?: DecimalCount) {
   if (size === null) {
     return '';
   }
@@ -257,11 +274,11 @@ export function toClock(size: number, decimals?: number) {
   return format ? `${hours}:${moment.utc(size).format(format)}` : hours;
 }
 
-export function toDurationInMilliseconds(size: number, decimals: number) {
+export function toDurationInMilliseconds(size: number, decimals: DecimalCount) {
   return toDuration(size, decimals, Interval.Millisecond);
 }
 
-export function toDurationInSeconds(size: number, decimals: number) {
+export function toDurationInSeconds(size: number, decimals: DecimalCount) {
   return toDuration(size, decimals, Interval.Second);
 }
 
@@ -276,19 +293,19 @@ export function toDurationInHoursMinutesSeconds(size: number) {
   return strings.join(':');
 }
 
-export function toTimeTicks(size: number, decimals: number, scaledDecimals: number) {
+export function toTimeTicks(size: number, decimals: DecimalCount, scaledDecimals: DecimalCount) {
   return toSeconds(size, decimals, scaledDecimals);
 }
 
-export function toClockMilliseconds(size: number, decimals: number) {
+export function toClockMilliseconds(size: number, decimals: DecimalCount) {
   return toClock(size, decimals);
 }
 
-export function toClockSeconds(size: number, decimals: number) {
+export function toClockSeconds(size: number, decimals: DecimalCount) {
   return toClock(size * 1000, decimals);
 }
 
-export function dateTimeAsIso(value: number, decimals: number, scaledDecimals: number, isUtc: boolean) {
+export function dateTimeAsIso(value: number, decimals: DecimalCount, scaledDecimals: DecimalCount, isUtc?: boolean) {
   const time = isUtc ? moment.utc(value) : moment(value);
 
   if (moment().isSame(value, 'day')) {
@@ -297,7 +314,7 @@ export function dateTimeAsIso(value: number, decimals: number, scaledDecimals: n
   return time.format('YYYY-MM-DD HH:mm:ss');
 }
 
-export function dateTimeAsUS(value: number, decimals: number, scaledDecimals: number, isUtc: boolean) {
+export function dateTimeAsUS(value: number, decimals: DecimalCount, scaledDecimals: DecimalCount, isUtc?: boolean) {
   const time = isUtc ? moment.utc(value) : moment(value);
 
   if (moment().isSame(value, 'day')) {
@@ -306,7 +323,7 @@ export function dateTimeAsUS(value: number, decimals: number, scaledDecimals: nu
   return time.format('MM/DD/YYYY h:mm:ss a');
 }
 
-export function dateTimeFromNow(value: number, decimals: number, scaledDecimals: number, isUtc: boolean) {
+export function dateTimeFromNow(value: number, decimals: DecimalCount, scaledDecimals: DecimalCount, isUtc?: boolean) {
   const time = isUtc ? moment.utc(value) : moment(value);
   return time.fromNow();
 }

packages/grafana-ui/src/utils/valueFormats/symbolFormatters.ts

-import { scaledUnits } from './valueFormats';
+import { scaledUnits, DecimalCount } from './valueFormats';
 
 export function currency(symbol: string) {
   const units = ['', 'K', 'M', 'B', 'T'];
   const scaler = scaledUnits(1000, units);
-  return (size: number, decimals: number, scaledDecimals: number) => {
+  return (size: number, decimals?: DecimalCount, scaledDecimals?: DecimalCount) => {
     if (size === null) {
       return '';
     }

packages/grafana-ui/src/utils/valueFormats/valueFormats.ts

 import { getCategories } from './categories';
 
-type ValueFormatter = (value: number, decimals?: number, scaledDecimals?: number, isUtc?: boolean) => string;
+export type DecimalCount = number | null | undefined;
 
-interface ValueFormat {
+export type ValueFormatter = (
+  value: number,
+  decimals?: DecimalCount,
+  scaledDecimals?: DecimalCount,
+  isUtc?: boolean
+) => string;
+
+export interface ValueFormat {
   name: string;
   id: string;
   fn: ValueFormatter;
@@ -22,7 +29,7 @@ let categories: ValueFormatCategory[] = [];
 const index: ValueFormatterIndex = {};
 let hasBuiltIndex = false;
 
-export function toFixed(value: number, decimals?: number): string {
+export function toFixed(value: number, decimals?: DecimalCount): string {
   if (value === null) {
     return '';
   }
@@ -50,20 +57,24 @@ export function toFixed(value: number, decimals?: number): string {
 
 export function toFixedScaled(
   value: number,
-  decimals: number,
-  scaledDecimals: number,
-  additionalDecimals: number,
-  ext: string
+  decimals?: DecimalCount,
+  scaledDecimals?: DecimalCount,
+  additionalDecimals?: DecimalCount,
+  ext?: string
 ) {
-  if (scaledDecimals === null) {
-    return toFixed(value, decimals) + ext;
-  } else {
-    return toFixed(value, scaledDecimals + additionalDecimals) + ext;
+  if (scaledDecimals) {
+    if (additionalDecimals) {
+      return toFixed(value, scaledDecimals + additionalDecimals) + ext;
+    } else {
+      return toFixed(value, scaledDecimals) + ext;
+    }
   }
+
+  return toFixed(value, decimals) + ext;
 }
 
-export function toFixedUnit(unit: string) {
-  return (size: number, decimals: number) => {
+export function toFixedUnit(unit: string): ValueFormatter {
+  return (size: number, decimals?: DecimalCount) => {
     if (size === null) {
       return '';
     }
@@ -75,7 +86,7 @@ export function toFixedUnit(unit: string) {
 // numeric factor. Repeatedly scales the value down by the factor until it is
 // less than the factor in magnitude, or the end of the array is reached.
 export function scaledUnits(factor: number, extArray: string[]) {
-  return (size: number, decimals: number, scaledDecimals: number) => {
+  return (size: number, decimals?: DecimalCount, scaledDecimals?: DecimalCount) => {
     if (size === null) {
       return '';
     }
@@ -92,7 +103,7 @@ export function scaledUnits(factor: number, extArray: string[]) {
       }
     }
 
-    if (steps > 0 && scaledDecimals !== null) {
+    if (steps > 0 && scaledDecimals !== null && scaledDecimals !== undefined) {
       decimals = scaledDecimals + 3 * steps;
     }
 
@@ -100,17 +111,17 @@ export function scaledUnits(factor: number, extArray: string[]) {
   };
 }
 
-export function locale(value: number, decimals: number) {
+export function locale(value: number, decimals: DecimalCount) {
   if (value == null) {
     return '';
   }
-  return value.toLocaleString(undefined, { maximumFractionDigits: decimals });
+  return value.toLocaleString(undefined, { maximumFractionDigits: decimals as number });
 }
 
 export function simpleCountUnit(symbol: string) {
   const units = ['', 'K', 'M', 'B', 'T'];
   const scaler = scaledUnits(1000, units);
-  return (size: number, decimals: number, scaledDecimals: number) => {
+  return (size: number, decimals?: DecimalCount, scaledDecimals?: DecimalCount) => {
     if (size === null) {
       return '';
     }

packages/grafana-ui/tsconfig.json

 {
   "extends": "../../tsconfig.json",
-  "include": [
-    "src/**/*.ts",
-    "src/**/*.tsx"
-  ],
-  "exclude": [
-    "dist",
-    "node_modules"
-  ],
+  "include": ["src/**/*.ts", "src/**/*.tsx"],
+  "exclude": ["dist", "node_modules"],
   "compilerOptions": {
     "rootDirs": [".", "stories"],
     "module": "esnext",
     "outDir": "dist",
     "declaration": true,
+    "strict": true,
+    "alwaysStrict": true,
     "noImplicitAny": true,
     "strictNullChecks": true,
     "typeRoots": ["./node_modules/@types", "types"],
     "skipLibCheck": true // Temp workaround for Duplicate identifier tsc errors
-  },
+  }
 }