uni-mp-canvas-tool/utils.js

a small canvasTool for uniapp-mp-weixin, can help you render your canvas easily such as drawText、drawView or drawImage. And you don't need to calculate the scale rate for diffient pixel ratio and just pass the params you get from design draft with 750rpx

/**
 * @description 同步获取系统信息
 * @returns { any }
 */
export const getSystemInfoSync = () => uni.getSystemInfoSync();

/**
 * @description 获取设备像素大小
 * @returns { number }
 */
export const getDeviceWidth = function () {
  //之所以要区分PC版，是因为旧逻辑一直是用screenWidth，但PC版的screenWidth比windowWidth大得多。直接改又怕影响现有功能，所以做个兼容
  let sysInfo = getSystemInfoSync();

  if ((sysInfo["platform"] || "").includes("windows")) {
    return sysInfo.windowWidth || 0;
  } else {
    return sysInfo.screenWidth || 0;
  }
};

/**
 * @description 比较当前版本库版本
 * @param {string} [v1='']
 * @param {string} [v2='']
 * @return {*}
 */
export function compareVersion(v1 = "", v2 = "") {
  v1 = v1.split(".");
  v2 = v2.split(".");
  let len = Math.max(v1.length, v2.length);

  while (v1.length < len) {
    v1.push("0");
  }

  while (v2.length < len) {
    v2.push("0");
  }

  for (let i = 0; i < len; i++) {
    let num1 = parseInt(v1[i]);
    let num2 = parseInt(v2[i]);

    if (num1 > num2) {
      return 1;
    } else if (num1 < num2) {
      return -1;
    }
  }

  return 0;
}