純js版本的房貸計算器，介面精美。
原始碼地址：
github地址：
https://github.com/confidence68/houseCal
預覽地址：
https://www.haorooms.com/uploads/loancal/
[JavaScript]
純文字檢視
複製程式碼
001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 031 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 050 051 052 053 054 055 056 057 058 059 060 061 062 063 064 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079 080 081 082 083 084 085 086 087 088 089 090 091 092 093 094 095 096 097 098 099 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 | //等額本息計算 benxi: function (type, num, year, lilv) { //每月月供額=〔貸款本金×月利率×(1＋月利率)＾還款月數〕÷〔(1＋月利率)＾還款月數-1〕 var mouth = parseInt(year) * 12, mouthlilv = parseFloat(lilv) / 12, dknum = parseFloat(num) * 10000; //每月月供 var yuegong = (dknum * mouthlilv * Math.pow((1 + mouthlilv), mouth)) / (Math.pow((1 + mouthlilv), mouth) - 1); //總利息=還款月數×每月月供額-貸款本金 var totalLixi = mouth * yuegong - dknum; //還款總額 總利息+貸款本金 var totalPrice = totalLixi + dknum, leftFund = totalLixi + dknum; //迴圈月份 var mouthdataArray = [], nowmouth = new Date().getMonth(), realmonth = 0; for (var i = 1; i <= mouth; i++) { realmonth = nowmouth + i; var yearlist = Math.floor(i / 12); realmonth = realmonth - 12 * yearlist; if (realmonth > 12) { realmonth = realmonth - 12 } //console.log(realmonth) //每月應還利息=貸款本金×月利率×〔(1+月利率)^還款月數-(1+月利率)^(還款月序號-1)〕÷〔(1+月利率)^還款月數-1〕 var yuelixi = dknum * mouthlilv * (Math.pow((1 + mouthlilv), mouth) - Math.pow((1 + mouthlilv), i - 1)) / (Math.pow((1 + mouthlilv), mouth) - 1); //每月應還本金=貸款本金×月利率×(1+月利率)^(還款月序號-1)÷〔(1+月利率)^還款月數-1〕 var yuebenjin = dknum * mouthlilv * Math.pow((1 + mouthlilv), i - 1) / (Math.pow((1 + mouthlilv), mouth) - 1); leftFund = leftFund - (yuelixi + yuebenjin); if (leftFund < 0) { leftFund = 0 } mouthdataArray[i - 1] = { monthName: realmonth + "月", yuelixi: yuelixi, yuebenjin: yuebenjin, //剩餘還款 leftFund: leftFund } } return { yuegong: yuegong, totalLixi: totalLixi, totalPrice: totalPrice, mouthdataArray: mouthdataArray, totalDknum: num, year: year }; }, //等額本金計算 benjin: function (type, num, year, lilv) { var mouth = parseInt(year) * 12, mouthlilv = parseFloat(lilv) / 12, dknum = parseFloat(num) * 10000, yhbenjin = 0; //首月還款已還本金金額是0 //每月應還本金=貸款本金÷還款月數 var everymonthyh = dknum / mouth //每月月供額=(貸款本金÷還款月數)+(貸款本金-已歸還本金累計額)×月利率 var yuegong = everymonthyh + (dknum - yhbenjin) * mouthlilv; //每月月供遞減額=每月應還本金×月利率=貸款本金÷還款月數×月利率 var yuegongdijian = everymonthyh * mouthlilv; //總利息=〔(總貸款額÷還款月數+總貸款額×月利率)+總貸款額÷還款月數×(1+月利率)〕÷2×還款月數-總貸款額 var totalLixi = ((everymonthyh + dknum * mouthlilv) + dknum / mouth * (1 + mouthlilv)) / 2 * mouth - dknum; //還款總額 總利息+貸款本金 var totalPrice = totalLixi + dknum, leftFund = totalLixi + dknum; //迴圈月份 var mouthdataArray = [], nowmouth = new Date().getMonth(), realmonth = 0; for (var i = 1; i <= mouth; i++) { realmonth = nowmouth + i; var yearlist = Math.floor(i / 12); realmonth = realmonth - 12 * yearlist; if (realmonth > 12) { realmonth = realmonth - 12 } yhbenjin = everymonthyh * (i - 1); var yuebenjin = everymonthyh + (dknum - yhbenjin) * mouthlilv; //每月應還利息=剩餘本金×月利率=(貸款本金-已歸還本金累計額)×月利率 var yuelixi = (dknum - yhbenjin) * mouthlilv; leftFund = leftFund - yuebenjin; if (leftFund < 0) { leftFund = 0 } mouthdataArray[i - 1] = { monthName: realmonth + "月", yuelixi: yuelixi, //每月本金 yuebenjin: everymonthyh, //剩餘還款 leftFund: leftFund } } return { yuegong: yuegong, totalLixi: totalLixi, totalPrice: totalPrice, yuegongdijian: yuegongdijian, mouthdataArray: mouthdataArray, totalDknum: num, year: year } } |
本帖轉自：https://www.haorooms.com/post/js_housecal